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An AC source of variable frequency f is ...

An `AC` source of variable frequency `f` is connected to an `LCR` series circuit. Which one of the graphs in figure represents the variation of current of current `I` in the circuit with frequency `f`?

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
D
At `f = f_(r)` (Resonant frequency)
Current is maximum
`f to 0, I to 0, f to oo, I to 0`
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