How many times, the current produced by AC Generator reverses its direction in one complete revolution of its coil?
AC generator supplies AC current. To determine how many times the direction of an Alternating Current changes we have to find out about its frequency. Frequency of an AC current implies number of complete waves present in a second. If the coil completes one revolution in one second then the frequency of the AC generator is said to be 1 hertz. The given picture will clear the concept,
In the picture there is only one complete wave in a second, hence its frequency is 1 hertz. Which means that the coil has completed one revolution. Hence we can that in one revolution the current change its direction twice first positive than negative.
Mr. Sharma used to park his car in the basement of his house. One day in the morning he noticed that his basement is full of knee-deep water and its walls were wet because of the hours-long rain at night. When he entered the basement, he experienced a major shock. His father seeing him from outside, rushed to the main switch and switched it off and thus saved his life.
(a) Why Mr. Sharma experienced the shock?
(b) What precautions should Mr. Sharma take to avoid such incidences in future?
(c) Which qualities were shown by Mr. Sharma’s father?