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cable length multiply with the design current and multiply again by mV/A/m (check on site guide) then devide it by 1000. then u will get the volt drops. BY; MAMERGA
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What is the required wire size for a 230 feet run 480 volt 100 amp?
Depends on length. The more length, the more resistance.
A DC voltmeter has a resistance of 20000 ohms per volt What is the resistance of the meter if the range selection switch is set on the 250 volt range?
5 megohms
What is the electrical resistance offered by a current carrying element that produces a drop of one volt when a current of one ampere is flowing through it?
Ohm's Law (V=IR) R=V/I=1
Will decreasing the resistance in a circuit decrease current flow if voltage is kept constant?
You should answer this question yourself by doing a couple of examples using Ohm's law I=E/R (current equals voltage divided by resistance. Here they are: Base circuit: 10 volt supply feeding a 10 ohm resistor calculate the current... New circuit: 10 volt supply (voltage kept constant) feeding a 20 ohm resistor (increased resistance) calculate the current... Did the current increase, or decrease? This way you can prove to yourself the answer!
A 24 volt battery supplies three devices wired in parallel that each have a resistance of 9 ohms. What is the voltage drop across each device?
A simple circuit has three resistors connected in series. The resistors are 14 ohms 12 ohms and 9 ohms. What is the total resistance of the circuit?
How can you improve volt-drop?
A: Decreasing the current and/or the resistance
How do you calulate the voltagedrop in an electrical circuit of the current draw was 65 amps and the circuit was 750 feet long with No. 6 TW conduct?
Look up in wire tables the resistance per ft for #6 wire (in ohms). Multiply by the total length of wire, 1500 ft because the current has to go through both wires. The answer is the total resistance of the cable. Then multiply by the current, 65 amps, and that's the volt-drop. In this example the total resistance is 0.59 ohms and the volt drop is 38.5 v. This cable can carry 65 amps but at this length the volt drop may be excessive and that is a reason for using a thicker conductor.
A resistor Connected to a 9 Volt supply dissipates 3 watts calculate the value of the resistance?
about 27ohms
What is lost volt according to science?
Lost Volt refers to the amount of energy lost (in a battery, generally) to energy resistance of components. It is generally fairly negligible, but to calculate: V=IR where I is the current and R is resistance.
What is the required wire size for a 230 feet run 480 volt 100 amp?
Depends on length. The more length, the more resistance.
Unit of electric resistance?
The unit of resistance is the 'Ohm'. A conductor through which a current of 1 ampere produces a voltage drop of 1 volt has a resistance of 1 ohm.
What gives the biggest resistance 3 volt bulb or 6 volt bulb?
3 volt bulb gives the biggest resistance
An alarm clock draws 0.5 a of current when connected to a 120 volt circuit calculate its resistance?
240 ohms
What is the total resistance of a parallel circuit with branch voltages of 440 volt and 440 volt and branch currents of 4 amp and 16 amp?
resistance = volt / current . 440 volt across a parallel circuit means the same 440 volt across both resistance s. hence resistance r = volt / current . 440 / 20 amp = 27.5 ohms total resistance
How do you calculate what gauge wire you need to use over very long distance runs like 500 ft on 3 conductor solid copper wire at 15 amps and 120V formula or way to calculate for various lengths amps?
Answer for UK, Europe and countries running a 50 Hz supply service.You first calculate how much volt-drop can be allowed, say it's 6 volts on a 120 v supply, then divide that by the current, and it tells you how much resistance is allowed in the cable. Then look up a wire table that gives that amount of resistance for the length of wire you have. NB you have to double the length of wire because the current goes along one wire and back along the other.For example for a 6 volt drop with 15 amps your allowed resistance is 0.4 ohms If the distance is 500 feet you need wire that gives 0.4 ohms per 1000 ft. In that case the AWG wire table says that the wire needed is 6 AWG.Answer for USA, Canada and countries running a 60 Hz supply service.In North America the maximum voltage drop allowed is 3%. On 120 volts this would be 3.6 volts.A #3 copper conductor will limit the voltage drop to 3% or less when supplying 15 amps for 500 feet on a 120 volt system.
A 15 volt battery is connected to 4 lights of the same resistance in a series circuit How many volts of electricity run across each light?
There is a 3.75 Volt drop across each bulb.
Calculate the resistance in a circuit in which a 9 volt batteriyproduces 3 ampheres?
V=IR so, R=V/I or resistance = Voltage / Amps Therefore, the resistance (R) = 9 volts / 3 Amps answer: 3 Ohms
