Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 15

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In series $L C R$ circuit, the phase difference between voltage across $L$ and voltage across $C$ is

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Important Questions on Alternating Current

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 16

With increase in frequency of an AC supply, the impedance of an

L C R

series circuit,

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 17

The reading of ammeter in the circuit is
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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 18

In a series

L - C

circuit, if

L = 10^{- 3} H

and

C = 3 \times 10^{- 7} F

is connected to a

100 V - 50 Hz

a.c. source, the impedance of the circuit is

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 19

Power factor of an ideal choke coil (i, e .,

R = 0

) is

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 20

In an A.C. circuit, the instantaneous values of e.m.f. and current are

e = 200 \sin (314 t)

volt and

I = 1 \sin (314 t + \frac{π}{3})

ampere. The average power consumed in watt is

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 21

An a.c. of frequency,

f

is flowing in a circuit containing only an ideal choke coil of inductance

L

. If

V_{0}

and

i_{0}

represent peak values of the voltage and the current respectively, the average power given by the source to the choke coil is equal to

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 22

When a voltage

V = V_{0} \cos ω t

is applied across a resistor of resistance

R,

the average power dissipated per cycle in the resistor is given by

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 23

In an

L C R

circuit, the resonating frequency is

500 kHz .

If the value of

L

is doubled and value of

C

is decreased to

\frac{1}{8}

times of its initial values, then the new resonating frequency in

kHz

will be