Question

An alternating current has a frequency of 50 hertz how many time does it change it direction in one second

Answer 1

$\underline\bold{\huge{Answer !!}}$

Frequency of alternating current in
India = 50 hertz

It means AC current oscillates 50 times.

1 oscillation = 2 times change in direction

Hence , in 1 second no. of times change in direction occur
= 2 × 50

= 100 times.