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?
power= I^2 x R where r is resistance
so r= .40/10=O>4 ohms.
resistance is 0.4 ohms.
To find the potential difference, we use ohm's law which states that,
#color(blue)(V= I R#