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JEE Main202118 Mar 2021Morning ShiftPhysicsAlternating CurrentActual

In a scries L C R resonance circuit, if we change the resistance only, from a lower to higher value :

Options

  1. AThe bandwidth of resonance circuit will increase.
  2. BThe resonance frequency will increase.
  3. CThe quality factor will increase.
  4. DThe quality factor and the resonance frequency will remain constant.

Correct answer

A. The bandwidth of resonance circuit will increase.

Step-by-step solution

The bandwidth of resonance circuit will increase. As we know that Bandwidth = R / L . Bandwidth ∝ R . So, bandwidth will increase.

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