Home Physics Electromagnetic Wave All Topic Question for Revision Test A variable frequency ac source is connected …
Physics Electromagnetic Wave All Topic Question for Revision Test MCQ (Single Correct)

A variable frequency ac source is connected to a capacitor. When the frequency is increased, the displacement current through the capacitor

A
increases
B
decreases
C
remains constant
D
first increases and then decreases

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Verified by Experts
The correct answer is:
A

For a capacitor connected to an AC source:

The displacement current is given by

where .
Thus, the amplitude of displacement current is directly proportional to the frequency (f).

So, when frequency increases displacement current increases.

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