What is the electrical energy of a circuit ? If the current flowing from the source is 5 A for duration of 2 s and the resistance of the circuit is `5 Omega`.

Options

A. 125 J
B. 25 J
C. 300 J
D. 250 J

Answer

D

Explanation

Given, current, I = 5 A
resistance, `R = 5 Omega`
time, t = 2 s
Energy, E = ?
Apply `" " E = (V^(2))/(R )t`
`rArr " " E = (I^(2)R^(2))/(R )t = I^(2)Rt`
or `" " E=5xx5xx5xx2`
or `" " E = 250 J`.