Question

What will be the frequency of an alternating current if its direction changes after every 0.01 seconds?

Answer 1

The time period of the current = (2x0.01) = 0.02 second Time period is the time required to complete one cycle. After half rotation the current reverses its direction. In one rotation, the current flows in the original direction completing one cycle. Frequency = 1/ time period = 50 Hz.

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Answer 2

Thus the value of frequency is f = 50 Hz

Explanation:

We are given that:

• Time "t" = 0.01 seconds
• To Find = Frequency of AC = ?

Solution:

First we need to find the time period.

The time required to complete one cycle is known as time period.

It is denoted by "T".

Time period = 2  0.01 = 0.02 seconds

Frequency = 1 / Time period

f =  1 / T

f = 1/ 0.02 = 50 Hz

Thus the value of frequency is f = 50 Hz