Question

How many times does AC used in India change direction in one second ?

Answer 1

The AC produced in India has a frequency of 50Hz.Coil is rotated at the rate of 50 revolutions per second. Since in one revolution of coil, the current reverses its direction 2 times , So in 50 revolutions of coil the current reverses its direction 2 x 50 = 100 Times.

Thus AC supply in India reverses its direction 100 Times in one second.

Answer 2

100 times because the frequency is 50 so it means that coil rotates 50 times in 1 second so 50×2=100