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Question

Assertion :Capacitor serves as a block for dc and offers an easy path to ac. Reason: Capacitive reactance is inversely proportional to frequency.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The capacitive reactance of the capacitor is given by

XC=1ωC=12πfC
So this is infinite for dc (f=0) and has a very small value for ac. Therefore a capacitor blocks dc.

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