Question

100 j heat produce d by a 4 resistors in one second .find the potential difference between the two ends.

Answer 1

H=100 J

T=1 s

R=4 Ohm

H=I2 RT

I2=H/RT

I2=100/4*1

I2=25

I=square root of 25

I=5 A

R=V/I

V=IR

V=5 * 4

V= 20 V