Question

An electrical iron takes a current of 5 ampere and develops 1.5 into 104 Julie of heat in 30 second calculate the resistance of electric iron.

Answer 1

I hope you are helpful by this answer...

Answer 2

Given :-

R = 20 Ω

I = 5 A

t = 30 s

H = I^2Rt

= (5)^2×20×30

= 15000 J

= 1.5 × 10^4 J