Voltage Meters Answers and News

Voltage Meters News

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Reviews Summary for Astron RS 35A - eHam.net

As Bob Seger used to say..."Like a Rock...". I bought this jewel at a yard sale back around 1982. It has been installed at many QTHs and been modified by me, many times. I have added cooling fans, Volt and Amp Meters, remote voltage adjust, etc. It ...

Vilsack unveils new green curriculum, expanded job ... - High Plains Journal

Electrical: Students are learning to rewire buildings and install smart meters, low-voltage thermostats, and energy-efficient appliances. --Culinary arts: Culinary students learn to incorporate fresh, organic, locally-grown produce into menus ...

Offshore Awakening: US Investment Flows to Offshore ... - RenewableEnergyWorld.com

What Carcieri and the East Coast political leaders don’t want – and what they’ve made clear they fear – is development of a federally imposed super grid of high voltage transmission ... offshore wind in less than 30 meters of water.

Reviews Summary for Ameritron AL800H - eHam.net

It took out a meter protection diode on a board once when it had a big bang - high voltage arc. The tubes survived as did everything ... The next problem was that I couldn't get full output on 40 meters, and the the output power drifted downward ...

Scottish Company Secures Pounds 500,000 Wave Hub ... - PennEnergy

... on the seabed in some 50 meters of sea water approximately 16 km off the coast of Cornwall and connected to the National Grid via a subsea cable. Hydro Group has been sub-contracted by JDR Cable Systems to provide a new high voltage connector ...

DHBVN to spend Rupees 1305 crore to boost power ... - New Kerala

UHBVB Managing Director Anurag Agarwal today said a major stress had been given to create High Voltage Distribution System (HVDS) on rural ... Under this major plan, all the two lakh defective meters would be replaced with new electronic meters at a ...

Autonomous Robot mowing and mulching system - Gizmag

The system creates a 'virtual fence' using a single low-voltage wire pegged around the perimeter of the lawn ... The Robomow has a 52cm cut and is capable of mowing approximately 500 meters squared of grass in a single session. Replacement of the ...

RTA opens bridges leading to Meydan as cooperation with ... - AME Info

For this purpose, the utility lines under the canal have been shifted and the elevation of two high voltage power lines has been upped to ensure sufficient vertical clearance distance from the road domain. Works also included constructing a new ...

RTA opens today bridges leading to Meydan as coop with ... - Zawya.com

The project comprises bridges extending 2025 meters; including two 710 meter-long bridges ... purpose, the utility lines under the canal have been shifted and the elevation of two high voltage power lines has been upped to ensure sufficient vertical ...

Voltmeter - Wikipedia, the free encyclopedia

Any measurement that can be converted to a voltage can be displayed on a meter that is suitably calibrated; for example, pressure, temperature, flow or level in a chemical process ...

Voltage and Current Meters: Providers and Solutions ...

Makers and suppliers of voltage and current meters. ... GF Piping Systems: Electrical Current Sensors Supplies engineered piping systems, valves, fittings, and actuators, as well as ...

AC Voltage Meter - Item - Camping World

Plugs into any 120-volt receptacle for continuous monitoring.

Voltage Meters

Prevent electric shock and electrocution by always testing for voltage before beginning work on an electrical fixture. Find easy to use voltage meters from Triplett and Ideal at ...

Voltage Meters - Voltage Meters and more

Source Voltage Meters from around the world. Find the Voltage Meters you need on Alibaba.com now.

Panel Meters, Digital Volt Meters, Amp Meters, AC Amp ...

Monitor voltage or amperage with easy to read analog meters. Meters are 3 inches wide by 2.5 inches high Analog panel meters for when you need to monitor or measure

Other Voltage Meters Results

Open Question: Problems with solar energy experiment? Weird results.?

I was testing the efficiency of a solar cell by testing the energy using current and voltage. The voltage data seems right but the current data does not. I got current values way higher than the max that the specs of the solar cell gave me. I used a current metre and a voltage meter. Can anyone suggest where i may have got the error from?Sorry i forgot to add that i tested it on 5 different resistors and on open and short circuits. The resistors i used were: 1 ohm 33 ohm 10 ohm 100 ohm 1K ohmsorry i forgot to mention that i tested in on 5 different resistors and on open and short circuits the resistors used were 1 ohm 10 ohm 33ohm 100 ohm 1k ohm more

Open Question: Help with Algebra problems...?

1. The voltage in a circuit is the product of two factors, the resistance and the current. If the voltage is 6ir + 15i + 8r +20, find the expressions for the current and resistance. (Note: the current will contain I and the resistance will contain r). 2. A swimmer's goggles fall off of a diving board that is 100 meters high. The height of the goggles after t seconds in given by 100-16t2. Factor 100- 16t2. = (10) ^2-(4T) ^2 (Is this right?) more

Open Question: 97 honda passport stereo?

i have 1997 honda passport i recently took out my head unit because some of the speakers weren't working. i removed the head unit and fixed the speaker wires, some had come loose from each other. but when i replaced the head unit nothing was working...no power nothing on the headunit.... i immediately thought maybe the fuse or something so i check the fuses under my dash and the stereo one was fine as was the rest of them. the engine fuses had no stereo one or anything linking to the stereo that i saw. i tried testing some of the wires with a voltage meter and none of them had a reading with or without the car on. i dont know what it could be if somebody has a suggestion please help.. im stumped right now. more

Open Question: Own a 2001 Tahoe,Replaced pump checked relay but pump has no power?

I have installed a brand new pump and relays but there is no power to the fuel pump, Ive checked it out with a voltage meter? more

Open Question: went to change terminal on battery, now my car wont start. The volt meter in my dash doesn't move at all ...?

...when i turn the ignition. The battery was very corroded and so was the positive wire. Could that wire be causing it to not start? Could the battery be dead all of a sudden because of a change in terminals? A guy plugged a voltage meter up to my battery and said it was working perfectly fine (14volts almost) Any thoughts on what this could be? more

Resolved Question: my car battery terminal broke, it has been replaced, but now my car won't start.?

When I turn the key, my voltage meter doesn't move at all (it will usually go between 8-14), and it only will start with a boost from another vehicle. When it is boosted, it runs fine for hours. Then when turned off, it will die. My interior light barely comes on so it makes me think there is a weak or bad connection somewhere. My dad helped me attach the new terminal and he did it nice and tight but no avail. Any thoughts on what it could be? Someone mentioned alternator but wouldn't that cause my car to not be able to drive around? which it can do when boosted.... Also when i turn the key the engine doesn't turn at all, it just makes 1 soft click noise. So car battery terminal broke, replaced with new one, and now car will not start unless boosted - in which it will run perfect until turned off when it dies again. more

Resolved Question: 10 points for best answer, physics question about 2 horizontal metal plates and a plastic sphere ball?

two large, horizontal metal plates are separated by 0.050 meters. a small plastic sphere is suspended halfway between the plates, and experiences an electric force of 4.5 x 10^-15 newtons that just balances the force of gravity on it. a) what is the potential difference (voltage) between the plates, if the charge on the plastic sphere is 6.4 x 10^-19 coulombs? b) calculate the mass of the plastic sphere? c) do you know any physics sites that has problems and answers in it? thanks more

Voting Question: Electricity Physics Question- Efficiency!?

From Book A Student Performs an experiment in which an electric motor is used to lift a 200g weight through 2m, thus increasing its potential energy by 4j. From measurements of the rate at which the weight is lifted the efficiency of the motor is to be determined. Two different voltages were used an the current was measured. A/ In the first experiment at 6V, a current of 0.25A was measured and the weight took 5 seconds to rise the 2 metres. What was the efficiency of the motor? B/ In the Next experiment the voltage was increased to 8V, the current was found to be 0.30A and the efficiency worked out to be 60%. How long did the motor take to lift the weight the 2m this time? PLEASE HELP!!! more

Voting Question: What is the electric field strength between the plates?

A parallel plate capacitor has a potential of 100 V across it and the plates are 1 mm apart. Calculate the electric field strength between the plates. I know this part Electric field strength = Voltage / distance between plates E = V/d E = 100/1*10^-3 E = 100, 000 V/m (Volt per metre) If the area of the plates is 1x10-4 square meters and the capacitance is 10 μF, what is the dielectric constant, , of the material between the plates? (this part is giving me trouble) more

Voting Question: How do I measure Hertz with a multimeter?

I have a greenlee digital multimeter and a voltage converter/transformer that converts 220v to 110v but It doesn't say anything about being a dual frequency converter. So how would i use the multimeter to see if it's kicking out 50 or 60 Hertz. I know that Frequency=1/t and that it depends how long you're measuring the peaks of the sinusoidal wave but I having a brainfart on exactly what to do with the meter reading different numbers in KHz. Thanks in advance for the answers. more

Voting Question: Sony Head Unit help 12v From Battery Isnt working?

Ok me again, i did a test to see if the wires were fucking up, (excuse my language im pretty much over this lol) I got just a normal wire and conncted it to the positive battery then connected it up to my head unit, then the frekin thing worked no lights but i could eject and put in a cd and stuff, and the voltage meter LED light went very bright, and when i put the voltage light on all the other wires coming out for the head unit about 2 - 3 of them just flash they dont say on, i put the ignition to ac and the same thing happend, whats wrong? anyone tell me? Thanks. more

Resolved Question: If a pair of copper cables 1000 meters in length with a CSA of 2mm Squared?

If a pair of copper cables 1000 meters in length with a CSA of 2mm Squared have 10 Volts RMS 1 khz signal applied across it, does the voltage appearing at the opposite end = 10v - the V drop across the overall length of the cable ? and if so what Voltage would appear at the other end ? If the resistivity of copper is 1.72 x 10¬8 is the volt drop doubled because there are 2 conductors ? Sorry about the vagueness of the question. I am spurring off a pair of cables in a 100 volt line speaker system and carrying the conductors 1000 meters but the signal going down the cable is only 10 volts RMS. is the input impedance of the transformer at the receiving end in Parallel with the copper pair a factor in the calculation ? My email is yarooooga@yahoo.co.uk if this becomes a 1001 questions scenario :o) more

Voting Question: I have track lighting that doesn't work, please help?

The track is getting power( i checked with my voltage meter), but the lights will not come on, this is a 12 volt system. Very confusing.... more

Resolved Question: problems with low voltage bathroom lights?

I am having trouble with one of my low voltage lights in my bathroom. It is using an electronic converter which reduces the voltage from 240v ac down to 12v ac. The maximum wattage of the bulb is 60 watt. I know that the existing electronic converter has burned out as it is not working at all and is burned to look at and smell. I got a replacement from my local lighting shop but when i connect it up it still does not work. I know the 240v supply current is present from my meter but it wont light the bulb. When i check the output from the electronic converter it is 0v ac. I took it back to the shop and the guy gave me another one to try this time a different manufacturer, but it is still doing exactly the same thing. It is showing a primary voltage of 240v ac going into it but absolutely nothing comming out of it. Can anyone give me some advice on this as i dont want to take it back as i am unsure if it something i am doing or if the second one is faulty too. many thanks more

Resolved Question: Internal resistance problem. Suppose that in Figure 3.3, Vo=12V, R1=225kohms, R2=375kohms, and Ri=12Mohms.?

...Initially, the voltmeter is disconnected. Heres the link to fig 3.3: http://twitpic.com/17nmov EXAMPLES: What is the voltage across R2? [Answer: 7.5 V.] What is the voltage across R2 with the meter connected? [Answer: 6.71328671328671 V.] QUESTION: If the internal resistance of the meter were 14 Mohms , what is the voltage across R2? Please show ALL calculations, I want to actually learn it! Thank you! more

Resolved Question: related rate question, please help!!! I need help!!?

Please help, I've been trying to solve for hours.. 1) A street light is at the top of a 15.5ft. tall pole. A man 5ft tall walks away from the pole with a speed of 7feet/sec along a straight path. How fast is the tip of his shadow moving when he is 30 feet from the pole? 2) Water is leaking out of an inverted conical tank at a rate of 9200.00 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 15 meters and the diameter at the top is 4 meters. If the water level is rising at a rate of 19 centimeters per minute when the height of the water is 1 meters, find the rate at which water is being pumped into the tank in cubic centimeters per minute. 3) In a simple electric circuit, Ohm's law states that , where V is the voltage in volts, I is the current in amperes, and R is the resistance in ohms. Assume that, as the battery wears out, the voltage decreases at 0.03 volts per second and, as the resistor heats up, the resistance is increasing at 0.04 ohms per second. When the resistance is 100 ohms and the current is 0.02 amperes, at what rate is the current changing? more

Resolved Question: related rate question, please help!!?

Please help, I've been trying to solve for hours.. 1) A street light is at the top of a ft. tall pole. A man ft tall walks away from the pole with a speed of feet/sec along a straight path. How fast is the tip of his shadow moving when he is feet from the pole? 2) Water is leaking out of an inverted conical tank at a rate of cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height meters and the diameter at the top is meters. If the water level is rising at a rate of centimeters per minute when the height of the water is meters, find the rate at which water is being pumped into the tank in cubic centimeters per minute. 3) In a simple electric circuit, Ohm's law states that , where V is the voltage in volts, I is the current in amperes, and R is the resistance in ohms. Assume that, as the battery wears out, the voltage decreases at 0.03 volts per second and, as the resistor heats up, the resistance is increasing at 0.04 ohms per second. When the resistance is 100 ohms and the current is 0.02 amperes, at what rate is the current changing? more

Resolved Question: Any idea why my water heater quit heating my water?

It's a 40 gallon G.E. electric water heater. I had to shut my water off for a couple of days because of a leak. I drained the water heater to use the water to flush my toilet while it was shut off. Before draining it I shut the power off to the water heater. I allowed it to refill before turning the power back on. Before my water leak it was working but when I turned it back on it didn't. So I bought new heating elements and thermostats and replaced them. It still didn't work. I used a multi-meter to test the electricity. I tested the voltage to every wire. The top and bottom thermostat wires and the top and bottom heating elements all read 121 volts. During testing I tried using couple of different ground locations, the ground wire on the water heater and the water heater itself. They all read 121 volts regardless of ground location. I tested the heating elements again using the nut on them for a ground, still 121 volts. Finally I tested the continuity of the heating elements, no problem there. I turned the temperture setting on the thermostats all the way up. And I checked the reset button. I don't know of anything else left to check or test. Besides replacing it does anyone have any suggestions? more

Resolved Question: Why can't I get this Dell Dimension 8400 to turn on?

I tested multiple power sources and power cables, made sure the psu was on 115. I replaced the CPU, motherboard, front panel switch, I/O control panel and cable, and the cpu fan and hood. I shorted the P1 connector which turned on the psu and tested it with a voltage meter and it read 5 and 12 v as it should. At this point I've replaced or tested everything in this machine that would prevent it from turning it and still nothing. Will a bad video card prevent it from turning on? WHAT IS WRONG WITH THIS PIECE OF ***!?!!?!!?!!No orange light on front but a small green light on the motherboard comes on. more

Resolved Question: Whats Wrong With My 3000GT?

I have a Mitsubishi 3000gt and it is dead at my house now. When Coming up from Florida to Virginia, the car ran fine. When I got into Virginia the lights started getting dim and the engine was losing power. And it finally died. I bought another alternator and it fired right up. After 2 months of using the new alternator, the car was pushing out really low voltage again and the car eventually died. I replaced the alternator again and tried to fire it up but it wouldnt. So, I took that alternator back and put a second one on and tried to fire it up but it wouldnt. So, I got a friend to charge my battery for an hour and the car drove fine on battery for about 30 minutes. And the voltage meter for the alternator was very very low again. Eventually it got lower and lower and lower voltage until the car died again. I'm really pissed off that my alternator isn't working. But I think it could be the alternator fuse or the cables going from the alternator to the engine and the battery are bad. What do you guys think??? I dont wanna have to keep buying more alternators..(lol)..and i would rather not take it to a mechanic so they can charge me a million dollars to fix the problem. Please help guys.I knew some smart ass would say "the problem is its a 3000gt" more

Resolved Question: How do I fix my curcuit breaker problem?

While sitting at my computer the power went out. I didn't think anything of it, I walked out my room and saw the living room fan was still on. Ok so I go to the breaker box flip on the light in the room and its dim. Non of the breakers are tripped but I flip all the breakers off and back on anyway, nothing, so i pull out my volt meter and i go checking. The outlets and lights to 5 separate breakers 3 on the left 2 on the right are all showing low voltage. I turned the 5 off and tested the outlets the 1 breaker at a time by turning 1 breaker on testing it and turning it off and going to the next. Same thing low voltage around 30-60 volts on 110 outlets. My real question is it possible that 5 random breakers failed at the same time do to a power serge or something or is something else wrong Also several breakers on the same rows as the problem ones work just fine. more

Resolved Question: Car battery help. battery questions?

2002 jeep grand Cherokee This fall my battery went dead. Tried charging it for well over 24hours. Wouldn't hold a charge. Put in a new battery and my car was fine for a few months. But my new battery went dead mid winter. I charged it in under a couple hours, so I know it will hold a charge. Left it for a day and the battery goes dead. Seeing as how I don't have a garage, and it being mid winter I disconnected the battery, and decided to work on my car closer to spring. Before I disconnected my battery I had enough charge in the battery to start my car. So a month goes by. And its warmer so today I connect the battery, and my car won't start. My volt meter says the battery has 9.76volts, and every 40seconds that go by the battery loses .01 volts (just my amp meter connected to the battery, nothing else). I'm currently charging my battery so I can preform a parasitic draw test just to be safe. But I'm starting to suspect I bought a brand new BAD battery. so my question is: Is it normal to have the battery voltage to drop by .01 every 40 or so seconds with nothing but an multimeter connected to the battery? Is it normal to have a battery charged enough to start a car multiple times, disconnect it, wait a month, reconnect the battery, and not being able to start the vehicle? thoughts, idea's, etc? just checked currently have 11.56 volts. But with the battery hooked up to the car the voltage is dropping by .01v every 2 to 3 seconds. Is that normal? I don't think it is. still have not preformed the parasitic draw test. still charging ma battery. more

Resolved Question: Electrical question about measuring voltage?

here are the two questions im asked: If the function/range switch is set at 200 VAC, what will the multimeter read if a measurement is made directly across both terminals of a good fuse or circuit breaker in a 120 VAC line? If the function/range switch is set at 200 VAC, what will the multimeter read if a measurement is made directly across both terminals of a blown fuse or tripped circuit breaker in a 120 VAC line? ok, the way im reading those is that the meter is connected on either side of the fuse like a continuity test which wont give you a voltage reading, so the answer to both of these is 0 volts right?which is it?really need to know which is correct, please help!! more

Resolved Question: Physics question about ammeters, voltmeters, and currents?

Tom has a sensitive ammeter that requires 1.00mA of current to provide a full-scale reading. The resistance of the ammeter coil is 500.0 He wants to use the meter for a physics experiment that requires an ammeter capable of reading 1.000 A. He has calculated that an equivalent resistance of 0.5000 will produce the necessary voltage drop of 0.5000 V (V= IR = 1.000 X 10^-3 X 500.0), so that only 1.000 mA of current passes through the meter. What value of shunt resistor, a resistor place in parallel with the meter, is needed? more

Voting Question: Two physics question I need help with... ?

1. Base your answer to the question on the information below. Io (pronounced “EYE oh”) is one of Jupiter’s moons discovered by Galileo. Io is slightly larger than Earth’s Moon. The mass of Io is 8.93 × 1022 kilograms and the mass of Jupiter is 1.90 × 1027 kilograms. The distance between the centers of Io and Jupiter is 4.22 × 108 meters. Calculate the magnitude of the acceleration of Io due to the gravitational force exerted by Jupiter. A.a = 7.12 m/s2 B.a = 0.0712 m/s2 C.a = 0.712 m/s2 D.a = 0.00712 m/s2 2. A copper wire is connected across a constant voltage source. The current flowing in the wire can be increased by increasing the wire's A.cross-sectional area B.length C.resistance D.temperature more

Resolved Question: 2003 silverado help plz!!!!!!!!!!!!?

i have a 2003 silverado and everytime i idle it wants to die... ive noticed the voltage meter on the dash drops but i have no warning lights. im afraid to drive... i called beene motorsales... my local dealership.. and they said 75 bucks to check it out...i tuned it up my self put new spark plugs (bosch double platnum) but i didnt do spark plug wires... its done this b4 i think its the fuel system.... more

Voting Question: zener diode circuit help?

I have an audio amp with watt meters whose meter lamps burn out almost monthly The lamps are 28 v bi pin bulbs fed by 26vdc I have used LED series\parallel array wizard to replace the lamps with white LEDs and need to feed the Leds with about 5.5vdc I now need to drop the 26v down to 5,5v ,thought that a dropping resistor and a zener would work but the wattages for both are excessive anyone have some thoughts on how to drop down to 5v easily Each meter would get 3 LEDs ,the forward voltage is 3.4v, the forward current is 35ma, so total current is 210ma + another 40 ma for cushion makes 250ma load current for the zener Thanks for the help more

Voting Question: testing lawnmower magneto, how do i get voltage to rise using a battery and a volt meter?

Resolved Question: Physics Power and Resistance Help?

1.) A 210 km long high-voltage transmission line 2.0 cm in diameter carries a steady current of 1040 A. If the conductor is copper with a free charge density of 8.4E28 electrons per cubic meter, how many years does it take one electron to travel the full length of the cable? 2.) A high-voltage transmission line with a resistance of 0.30 ohms/km carries a current of 1000 A. The line is at a potential of 690 kV at the power station and carries the current to a city located 155 km from the station. (a) What is the power loss due to resistance in the line? (b) What fraction of the transmitted power does this loss represent? more

Resolved Question: What am I doing wrong with my homemade electric generator?

I tried different ways to make one. (This is for a physics project by the way and it has to be hand generated, no batteries or anything like that.) One way was using a bike and attaching magnets to the wheel and spinning the bike. I have insulated wire with the ends stripped so its just wire that is attached to the volt meter. The wire is wrapped around this small tube so that it is wrapped multiple times because the more it is wrapped the greater the voltage suppose to be. However, the most voltage I received was .002! What am I doing wrong? XXXXXXXXXXXXXXXXXXXXXX The other one I made was just putting the wire around a toilet paper roll (that was stripped of the toilet paper). Then I put some magnets IN the roll and closed both ends and start shaking the magnets. I got more voltage... I got .163 Voltage. I need to get over at least 1 voltage. So please..anyone help. more

Resolved Question: What is the basic concept regarding the Voltmeter ,ammeter?How this meter's measure voltage and current..?

Voting Question: Technical question about electric meter "running backwards"?

I realize many here say you can generate more electricity than you use and in some cases actually supply the grid with outgoing power --- but for you electrical engineers out there, here's my question: Wouldn't putting your own personally generated power onto the grid be introducing an out-of-phase signal on the wire? I know you can do this with DC current, but with AC I don't think you could match the exact phase and voltage and actually create a "negative" A/C flow could you?Great answers - thank-you very much. I appreciate your sharing your expertise. I've learned something new today. more

Resolved Question: What could be draining my car battery?

I just purchased 2 new batteries for my Cargo van. One battery is under the hood, that is daisy chained to the secondary battery, that is connected to the 2k watt inverter. The reason I purchased these 2 is because the employee at Wal-Mart said both batteries were bad. I swear I think they say batteries are "bad" just so they can sell batteries. So, i changed both batteries, and now I am having the same problem. I figured it was due to me leaving my GPS plugged into the lighter causing it to drain my battery. So, I unplugged it after charging (running) my van for 40 minutes. To measure that the batteries were fully charged I used a volt meter, and tested the voltage while the van was running at 13.65. With the van off the voltage read 12.05. 2 days later the battery under the hood read under 3 volts. Now, wtf can be draining the batteries? I have no idea what's doing this. more

Resolved Question: What ever happend to can you hear me now guy from Verizon?

And I have another question, what with the B.S about health effects from cellphones? I have a emf meter and tested my cellphone and it show only showed 0.3mg I'm sure that barely effect on anyone's health. If some one who lives close to high voltage substation or Hightesion power lines yeah there might be a health hazard. I'm trained radiological montor of emergency services and far as I know atomic radiation can give brain tumors over a length of time, but cell phones what bunch of bull. more

Voting Question: Voltage of speaker system problem- need help asap plz?

A person is moving a stereo system from a small room to a larger room. In the small room, he used copper wires which had a length of 2.5 meters and a cross-sectional radius of 0.88 cm. In the larger room the length of the copper wires need to be 18.3 meters long. If we assume the voltage across both speakers wires is the same, what does the cross sectional radius of the wires in the larger room need to be such that the power lost to the resistance of the wires is the same in both rooms such that the speakers will play equally loud in both rooms for a given volume level? Answer in cm. more

Resolved Question: trouble shooting a dishwasher heating element?

hi. i have a good multi meter and need to trouble shoot a dishwasher heating element. first of all, how do i locate the heating element, (color code for wires or whatever), and then what's the best way to check it? isolate and ohm it out, or can i check it hot for voltage? also, i guess there is a relay in the circuit so i guess i check that energized for voltage, correct? if there are standard color wire codes, that would be nice to know. all i know is the heating element isnt heating and i need to fix it. any help would be appreciated. thank you! jim more

Resolved Question: "Resistivity of a wire" help?

When a potential difference of 12 V is applied to a wire 7.2 m long and 0.21 mm in diameter the result is an electric current of 2.4 A. What is the resistivity of the wire? Relevant Equations: V=IR - V= Voltage (Volts) - I= Current (amps) - R= Resistance (Ohms) R=ρL/A - R= Resistance (Ohms) - ρ= Resistivity (Ohm meter) - L= Length of resistor (m) - A= Cross sectional area Things I tried: I'm not sure if my calculations are just off, but I attempted using the V and amp amounts to get the R. I then transferred that into the second equation to solve for rho (ρ). What am I doing wrong? more

Resolved Question: Electrical Question - Blower Motor?

This is a weird one. A little history first. I know that the blower motor and the resistor are working fine. When turned on, I have power to the blower motor, per the voltage meter, of 13 volts. But, I cannot get the motor to budge a micro inch when I turn it on. We tested the ground, the hot wire and independently tested the motor and resistor. I am am stumped. more

Resolved Question: resistivity true or false please help?

Which statements are true for the resistivity of a metal conductor: It depends on the temperature of the material. It is positive for copper but negative for carbon. It depends on the electronic structure of the material. It becomes smaller as the cross-sectional area of the material becomes smaller. It has units of ohms/meter. It is an intrinsic property of the conductor and is independent of the voltage applied to it. if you only know a couple that would help, I know some of them are right but there are a few i'm not sure about. Thanks. more

Voting Question: Ford Focus electrical problems?

It is a 51 plate ford focus and the battery keeps dying (The battery is about 12 months old). I am a bit suspicious to what the problem could be as the front windscreen as leaked water into the car before and filled the passenger foot well up by a couple of inches. (The leak has now been fixed) I have taken the battery out and charged it up then put it back in. When I checked the voltages I got 12.5 volts with engine off and 14.5 volts with engine running. But after a few days off sitting and a few small trips it won't start. So something most be draining the battery. Any suggestions or tests I can do ? I have done some test on the alternator but not sure if it is right. I started the engine and put a meter between the battery + terminal and the alternator positive and got a reading of 0.45 - 0.55 volts. The test said anything above 0.2 volts would indicate a problem with the alternator. Is this correct. What other tests can I do to make sure the battery is OK and alternator is OK or to check for sorts ?P.S. Just before the bettery dies if I turn on any heaters, lights etc. All the dash lights start to flash. But this would only be due to the battery having low voltage I guess. more

Resolved Question: I need help identifying this wire for my science project!?

I'm doing a solar cell science project and I need help identifying what this is. I'll explain what it looks like. It has to do with electricity. There are 2 colors red and black. There are plastic coverings at the end. There are these mouths? with jagged sides. It carries the energy from the solar cells to the digital multi meter so I can read the voltage. Sorry for my horrible description, but can anyone help me? I would like it if anyone suggests what it is, then I can google that to confirm if thats is it. more

Resolved Question: what type of voltage meter?

im am doing science fair with a partner for the first time and need to know what kind of voltage meter to use to measure static electricity. more

Resolved Question: dodge truck 1978 question?

do you need the voltage meter on dash to complete the charging system? more

Resolved Question: Trimmed motor down to flush and 2 days later it won't trim up. Solenoid clicks but won't trim.?

Solenoid mounted in boat just clicks. Changed solenoid and still nothing. Put meter on wires going to trim unit and have voltage. There is only like 9 volts going to the wires. more

Resolved Question: STATISTICS: Find a function of Y-bar that is an un-biased estimator of theta. In general how do you do this?

These are not questions I have to turn in, but I don't understand how to find un-biased estimator functions among other things... Any ideas on any of this would be very greatly appreciated. For example, the reading on a voltage meter connected to a test circuit is uniformly distributed over the interval (theta, theta + 1) Where theta is the true but unknown voltage of the circuit. Suppose that Y(1), Y(2), ....... , Y(n) denote a random sample of such readings. a. Show that Y-Bar is a biased estimator of theta and compute the bias. b. Find a function of Y-bar that is an unbiased estimator of theta Another one that is driving me mad, (I can't find similar done examples), is: Let Y(1), Y(2), ...... , denote a random sample of size n from a population whose density is given by: f(y) = ay^(a-1) /theta^a 0<= y <= theta, and 0 elsewhere. "a" is a known fixed value but theta is unknown. Now consider the estimator theta-hat = max(Y(1), Y(2) ...... Y(n)). a. Show that theta-hat is a biased estimator for theta. What I also could really use is some sort of PDF/webpage that has examples of how to do these, I can't seem to find good ones. Thanks for any help you might have. Brian more

Voting Question: Car stereo. Why isent my yellow wire (battery lead) getting 12 volts?

For some reason my yellow wire isent getting me much voltage... When i check it on the Volt meter its little to none... But when I combine the yellow wire and red wire my clock turns on in my car??? So mabe the yellow wire is only putting out enough energy to turn my clock on but not turn my deck on? What do you think is wrong? and any ideas on what I should do or how could I fix it? more

Resolved Question: How to calculate percentage error of measurements from a voltmeter?

The question is: A voltmeter who's accuracy is guaranteed to within 2% of its full-scale reading is used on its 0-50V scale. The voltage measured by the meter is 15 and 42V. Calculate the possible percentage error of both readings. I'm not sure if that means + - 2% of 15 and 42, or what % is 15 and 42 of 50? more

Resolved Question: Alternator or battery failing. How can I tell which one it is?

I was driving home from McDonalds tonight. I turned my A/C on (for the heat, being that it's about 3 degrees outside!) which made a loud squealing noise, then faded. I assumed this was probably just because the truck had been sitting in below freezing temps for a few days now. All of the sudden my dash lights (and I think my headlights) dimmed, my battery indicator light came on and my voltage meter dropped from about 14 to about 4, or in other terms, from about midway to less than half. Pretty much "in the red". I only had a few blocks to go, so I quick shut the air off and turned off my CD player in an effort to reserve power in order to make it home. I also dropped down a gear to try and keep the RPMs up. I made it home just fine and shut the truck off and all my dome lights came on just fine and dandy, but the battery meter stayed on the voltage meter was still in the red. My question is, I'm unsure if it's the battery or the alternator. I doubt it's the belt since the belt is brand new. Is there an easy way to tell which is failing? more

Resolved Question: Imagine that you’ve properly connected your multimeter into an operating circuit, and the meter’s function/?

A. the meter measured a voltage of 1 V at the point under test. B. the power to the circuit is turned off. C. the voltage at the point under test is greater than 20 V. D. the function/range switch should be set to the next lowest range. more

Resolved Question: You’re using your meter to make voltage measurements in the circuit shown in Figure A-2. Your meter is?

A. Switch S1 is open. B. Resistor R2 has a resistance value that’s twice the value of either R1. C. Switch S1 is closed. D. Resistors R1 and R2 have equal resistance values. more

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