A 10 ohm resistance, 5 mH coil and 10 μF capacitor are joined in series. When a suitable frequency alternating current source is joined to this combination, the circuit resonates. If the resistance is halved, the resonance frequency :

A 10 ohm resistance, 5 mH coil and 10 μF capacitor are joined in series. When a suitable frequency alternating current source is joined to this combination, the circuit resonates. If the resistance is halved, the resonance frequency :

  1. A

    is halved

  2. B

    is doubled

  3. C

    remains unchanged

  4. D

    is quadrupled

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    Solution:

    Resonant frequency= 1LC

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