Question

(ntse exam question) An AC generator is connected to an electric appliance. In 10 revolutions of the armature the current in the appliance changes direction : (1) 5 times (2) 10 times (3) 20 times (4) 40 times

Answer 1

(3) 20 times. As the frequency of AC current is 50 hertz

Answer 2

Dear Student,

A.C. stands for Alternating Current.

● Answer -

(3) 20 times

◆ Explanation -

In AC generator, electron changes its direction in every half a circle. So in one complete cycle, current has changed direction twice in AC generator.

Hence, in 10 revolutions of the armature the current in the appliance changes direction in 10×2 = 20 times.

Thanks dear. Hope this helps you...