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In LCR circuit at resonance current in t...

In `LCR` circuit at resonance current in the circuit is `10 sqrt(2) A`. If tnow frequency of the source is changed such that now current lags by `45^(@)` that applied voltage in the circuit . Which of the following is correct.

A

Frequency must be increased and current after the change is 10 A

B

Frequency must be decreased and current after the change is 10 A

C

Frequency must be decreased and current is same as that of initial value

D

The given information is insufficient to conclude anything

Text Solution

Verified by Experts

The correct Answer is:
A
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Knowledge Check

  • In a circuit L, C and R are connected in series with an alternating voltage source of frequency f . The current lead the voltages by 45^(@) . The value of C is :

    A
    `(1)/(pi upsilon(2pi upsilon L-R))`
    B
    `(1)/(2pi upsilon(2pi upsilon L-R))`
    C
    `(1)/(pi upsilon(2pi upsilon L+R))`
    D
    `(1)/(2pi upsilon(2pi upsilon L+R))`

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