what is resistance at 8amps
Answers
Answer:
If you have 8 amps flowing through a 2 ohm resistor, you have... 8 amps!
You'd need a potential difference of 16 volts to give an 8 amp current through a 2 ohm resistor.
V=IR
This is Ohm's law, which states that voltage (V) is equal to the current (I, measured in Amps) times the resistance (R, measured in ohms).
You can think of voltage as being a little like pressure, forcing an amount of water through a restricted pipe. (This is a clumsy analogy that easily breaks down, but it's a pretty good starting point).
An amount of water in a given time period is similar to the current (Amps, = I).
The restriction in the pipe is a bit like the resistance (Ohms = R).
If you increase the resistance by narrowing the pipe, you either have to increase the pressure (voltage) or accept that you're going to have a lower water flow (analogous to the current).
Likewise, if you increase the pressure whilst leaving the restriction unchanged, you'd get a higher flow of water. (So higher voltage, same resistance equals larger current).