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Quality factor and bandwidth of a series LCR circuit

This type of question, asked 5 times: 2021 Paper 9, 2021 Paper 25, 28 Jul 2022, 24 Jan 2023, 8 Apr 2023. All 5 questions below, oldest first.

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  1. Question 1

    2021 Paper 9

    16
    In a series LCR resonance circuit, if we change the resistance only, from a lower to higher value:

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  2. Question 2

    2021 Paper 25

    25
    In a series LCR resonant circuit, the quality factor is measured as 100. If the inductance is increased by two- fold and resistance is decreased by two -fold, then the quality factor after this change will be ____\_\_\_\_.

  3. Question 3

    28 Jul 2022

    24
    The frequencies at which the current amplitude in an LCR series circuit becomes 12\frac{1}{\sqrt{2}} times its maximum value, are 212rads−1212rads^{- 1} and 232rads−1232rads^{- 1}. The value of resistance in the circuit is R=5ΩR = 5\Omega. The self- inductance in the circuit is ____\_\_\_\_ mHmH.

  4. Question 4

    24 Jan 2023

    29
    In the circuit shown in the figure, the ratio of the quality factor and the band width is___ S.

  5. Question 5

    8 Apr 2023

    111
    A series combination of resistor of resistance 100 Ω\Omega, inductor of inductance 1H1H and capacitor of capacitance 6.25μF6.25\mu F is connected to an ac source. The quality factor of the circuit will be___