Question

An electric current of 2.0 A passes through a wire of resistance 25 Ω. How much heat will be developed in 1 minute?

Answer 1

Given:-

Current through the wire, i = 2 A

Resistance of the wire, R = 25 Ω

Time taken, t = 1 min = 60 s

Heat developed across the wire,

H = i²Rt
    = 2 × 2 × 25 × 60
    = 100 × 60 J = 6000 J