Assertion : A capacitor blocks direct current in the steady state… - Vidyadip

MCQ

Assertion : A capacitor blocks direct current in the steady state.

Reason : The capacitive reactance of the capacitor is inversely proportional to frequency $f$ of the source of $emf$.

✓
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.

✓

Answer

Correct option: A.

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

a
Capacitive reactance $X_{C}=\frac{1}{2 \pi f C}$

Frequency of direct current is zero i.e. $f=0$ $\Longrightarrow X_{C}=\infty$

Thus resistance of capacitor for direct current is very large and so it do not allow the direct current to pass through it.

Hence, option $A$ is correct.

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