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Q.

A series LCR circuit is operated at resonance. Then

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a

none

b

current amplitude is minimum

c

impedance is minimum, power transferred is maximum

d

voltage across R is minimum

answer is B.

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Detailed Solution

Impedence is minimum at resonance XL=XC so, Z=R at resonance, Zmin=R so, current value is high resonance. Power transferred is maximum as value of Zminimum at resonance. Then the value of current is increase. Hence power transferred is maximum.

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