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In the LCR circuit shown in figure unkno...

In the `LCR` circuit shown in figure unknown resistance and alternating voltage source are connected.When swith `S` is closed then there is a phase difference of `pi/4` between current and applied voltage and voltage across resister is `100/sqrt2 V`.When switch is open current and applied voltage are in same phase.Neglecting resistance of connecting wire answer the following questions :
Resonance frequency of circuit is:

A

`50 Hz`

B

`25 Hz`

C

`75 Hz`

D

Data insufficient for calculation

Text Solution

Verified by Experts

The correct Answer is:
B
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