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In the following circuit the current is ...

In the following circuit the current is in phase with the applied voltage. Therefore, the current in the circuit and the frequency of the source voltage respectively, are

A

`(V)/(R) and (1)/(2pisqrtLC)`

B

`"zero and" (1)/(sqrtLC)`

C

`sqrt((C)/(L))v, and (2)/(pisqrtLC)`

D

`sqrt((C)/(LR^(2)))and (2)/(sqrtLC)`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • In an ac circuit, the current lags behind the voltage by pi//3 . The components in the circuit are

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    B
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    C
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  • When an alternating voltage of 220 V is applied across a device P , a current of 0.25 A flows through the circuit and it leads the applied voltage by a angle pi/2 radian. When the same voltage source is connected across another device Q , the same current is observed in the circuit but in phase with the applied voltage. What is the current when the same source is connected across a series combination of P and Q ?

    A
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    B
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    C
    `1/sqrt2` A leading in phase by `pi/4` with voltage
    D
    `1/(4sqrt2)` A leading in phase in `pi/2` with voltage
  • A 0.21-H inductor and a 88-Omega resistor are connected in series to a 220-V, 50-Hz AC source. The current in the circuit and the phase angle between the current and the source voltage are respectively. (Use pi= 22//7)

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    B
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