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
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a
Is halved
b
Is doubled
c
Remains unchanged
d
In quadrupled
answer is C.
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Detailed Solution
Resonant frequency =12πLC does not depend on resistance.
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