Question

a current of 20mA flows through a wire when a potential difference of 5Vi is applied between its ends. the resistance of the wire must be______​

Answer 1

Answer:

R = 2.5 * 10^2 ohm

Explanation:

I = 20mA = 20 × 10^-3 V= 5V

V = IR

R = V/I

R = 5/20 * 10^-3

R = 1/4 * 10^3

R = 0.25 * 10^3

R = 2.5 * 10^2 ohm