Question

The power of an electric iron is 450w. It work for 10 minutes. What will be heat generated

Answer 1

Given :-

Power = P = 450 W

Time = t = 10 min = 600 s

As we know that,

H = i²Rt

H = Pt ( i²R = P)

H = 450 × 600

H = 270000 J

H = 270 KJ

Hence,

Heat generated = H = 270 KJ