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MHT CET202211 Aug 2022Morning ShiftPhysicsAlternating CurrentActual

An AC voltage source of variable angular frequency and fixed amplitude V₀ is connected in series with a capacitance C and an electric bulb of resistance R (inductance zero). When is increased

Options

  1. ATotal impedance of the circuit increase.
  2. BThe bulb glows brighter.
  3. CThe bulb glows dimmer.
  4. DTotal impedance of the circuit is unchanged.

Correct answer

B. The bulb glows brighter.

Step-by-step solution

Potential difference across bulb, V=I R= V₀ R R^2+ ( 1 C )^2 When is increased, potential across the bulb as well as brightness increases.

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