Question

What is the resistance of a resistor if the potential difference across the resistor is 4.0 V when a current of 10.0 A flows through the resistor?

Answer 1

Power in the circuit= voltage x current 4 x10=-40 watts.

Explanation:

power= I^2 x R where r is resistance
so r= .40/10=O>4 ohms.
resistance is 0.4 ohms.

Answer 2

`0.4` `Ω`

Explanation:

To find the potential difference, we use ohm's law which states that,

`color(blue)(V= I R`

Where, `V` is the potential difference across the conductor in Volts, `I` is the current in Amperes and `R` the resistance in Ohm

`rarr4=10xxR`

`rarrR=4/10`

`color(green)(rArrR=0.4` `color(green)(Ω`