Question

An electric device gives out 5760J of heat energy in 1 min , when current flows through it a p.d. of 24 V. Find the resistance of the device.​

Answer 1

Explanation:

Given,

H = 5760J

T=1min = 60 s

V= 24V

I = ?

R= ?

Using,

H= P = VI

H = VI

I= 5760/24

I=240A.

USING, V= IR

R = V/I

R=24/240

R=0.1ohm