# 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?

##### 2 Answers

Apr 24, 2017

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.

Apr 25, 2017

#### Explanation:

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

#color(blue)(V= I R#

Where,