Q.

In the series LCR circuit (figure), the voltmeter and ammeter readings are:

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a

V = 100 V, I = 2 A

b

V = 100 V, I = 5 A

c

V = 1000 V, I = 2 A

d

V = 300 V, I = 1 A

answer is A.

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Detailed Solution

HereVL=VC They are in opposite phase. Hence, they will cancel each other. Now the resultant potential difference is equal to the applied potential difference = 100 VZ = R               (∴XL=XC)∴Irms=VrmsZ=VrmsR=10050=2A
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In the series LCR circuit (figure), the voltmeter and ammeter readings are: