Question

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.

• A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
• B. If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
• C. If Assertion is true statement but Reason is false.
• D. If both Assertion and Reason are false statements.

Answer 1

The correct option is A If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

Capacitive reactance $X_C=\frac{1}{2\pi fC}$
Frequency of direct current is zero i.e. $f=0$
$⟹X_C=\infty$
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.