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

Question:

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

  1. (1) The bandwidth of resonance circuit will increase.

  2. (2) The resonance frequency will increase.

  3. (3) The quality factor will increase.

  4. (4) The quality factor and the resonance frequency will remain constant.

Correct Option: 1

Solution:

(1)

Bandwidth $=\mathrm{R} / \mathrm{L}$

Bandwidth $\propto \mathrm{R}$

So bandwidth will increase

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