Question

What is the frequency of current if current change its direction 100 times

Answer 1

It depends on frequency which we are using. In India and all other Asian countries, Frequency used is 50 Hz, but in Europe its is 60 Hz.

For a frequency of 50 Hz,

Time Period = 1/frequency = 1/50 = 0.02 Seconds.

This means current completes its cycle in 0.02 seconds.

One cycle has a positive portion and negative portion.

So, AC current changes its polarity in every 0.01 seconds.

So, Answer to your question,

In one second, current changes its polarity in 1/0.01=100 times.

Answer 2

Answer:

50Hz

Explanation:

Since every oscillation constitutes moving from the mean to one of the extremes, then to the other extreme and back to the mean, we can see that the oscillating object changes direction two times.

Hence, for 2 changes in current direction, there is 1 oscillation performed.

Therefore, for 100 changes in current direction, there are 50 oscillations performed.

Hence, if 100 changes in current direction are performed per second, then 50 oscillations are performed per second.

Hence, if 100 oscillations in current direction are performed in 1 second, the frequency of the AC (Alternating Current) is 50Hz.

Hope it helps.

xD