Question

Assertion : Magnitude of an alternating current changes with time.
Reason: The direction of a.c. changes after every 1/100th part of a
second in our household circuits.​

Answer 1

Answer:

both assertion and reason is correct

Answer 2

Both Assertion and Reason are correct.

Explanation:

It depends on the frequency we use. The frequency used is 50 Hz in India and all other Asian countries, but 60 Hz in Europe.

At a frequency of 50 Hz

Period = 1 / frequency = 1/50 = 0.02 seconds.

This means that the current ends its cycle in 0.02 seconds.

A cycle has a positive and a negative part.

Then the alternating current changes its polarity every 0.01 seconds.

So answer your question

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

Learn more about Alternating current

In order to rectify an alternating current one uses a:

A)- thermocouple

B)- diode

C)- triode

D)- thansister​

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A) What is meant by the terms alternating current and direct current?

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