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MHT CET2012PhysicsAlternating Current

A lamp is connected is series with a capacitor and an AC source, what happens if the capacity of the capacitor is reduced?

Options

  1. AThe lamp shines more brightly
  2. BThe lamp shines less brightly
  3. CThere is no change in the brightness of the lamp
  4. DBrightness may increase or decrease depending on the frequency of the AC

Correct answer

B. The lamp shines less brightly

Step-by-step solution

The lamp shines less brightly because, when capacity of the capaictor is reduced, the capacitive reactance (X_ C = 1 C ) increases and hence, the current through the lamp decreases.

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