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MHT CET202416 May 2024Evening ShiftPhysicsAlternating CurrentActual

A light bulb connected in series with a capacitor and an a.c. source is glowing with a certain brightness. On reducing the capacity of capacitance and frequency of source, the brightness of the lamp (respectively)

Options

  1. Ais reduced, is increased
  2. Bis reduced, is reduced
  3. Cis increased, is reduced
  4. Dis increased, is increased

Correct answer

B. is reduced, is reduced

Step-by-step solution

The capacitive reactance is given by X _ C = 1 2 fC If f or C is reduced, X _ C will also increase. This results in the increase of the total impedance of the circuit. Hence, both the current and brightness will decrease.

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