Published by:
CGP EDU Academic Team
Published on: September 12, 2026
A capacitor is a perfect insulator for
Text Solution
Verified by ExpertsThe correct answer is:
B
Step 1: Understand the behavior of capacitors. A capacitor allows the storage of electrical energy in an electric field when a voltage is applied.
Step 2: Recall that a capacitor blocks direct current (DC) after being fully charged, as the voltage across it becomes constant and the current stops flowing.
Step 3: In contrast, an alternating current (AC) changes direction periodically, allowing current to flow through a capacitor due to the charging and discharging cycles. Therefore, capacitors do not act as perfect insulators for AC.
Conclusion: Since capacitors act as perfect insulators for direct currents, the correct answer is B.
Step 2: Recall that a capacitor blocks direct current (DC) after being fully charged, as the voltage across it becomes constant and the current stops flowing.
Step 3: In contrast, an alternating current (AC) changes direction periodically, allowing current to flow through a capacitor due to the charging and discharging cycles. Therefore, capacitors do not act as perfect insulators for AC.
Conclusion: Since capacitors act as perfect insulators for direct currents, the correct answer is B.
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