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Question: Answered & Verified by Expert
A lamp is connected is series with a capacitor and an AC source, what happens if the capacity of the capacitor is reduced?
PhysicsAlternating CurrentJEE Main
Options:
  • A The lamp shines more brightly
  • B The lamp shines less brightly
  • C There is no change in the brightness of the lamp
  • D Brightness may increase or decrease depending on the frequency of the AC
Solution:
1986 Upvotes Verified Answer
The correct answer is: The lamp shines less brightly
The lamp shines less brightly because, when capacity of the capaictor is reduced, the capacitive reactance $\left(X_{C}=\frac{1}{\omega C}\right)$ increases and hence, the current through the lamp decreases.

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