Question

400j of heat is produced in 4s in a 4 ohm resistor.find the potential difference across the resistor

Answer 1

H = VIt
H = V ×V/R×T (I=V/R)
H=V×V×T/R
400=V×V×4/4
400=V×V
$2 \sqrt{20}$

Answer 2

Answer:

V = 20

Explanation:

H = V^2 *t/R

1. 400=V^2 * 4/4

400=V^2

20=V