Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>EXERCISE>Q 14

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For the series $L C R$ circuit shown in the figure, what is the resonance frequency and the amplitude of the current at the resonating frequency?

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Important Questions on Alternating Current

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>EXERCISE>Q 15

If resistance

R = 10 Ω,

inductance

L = 2 mH

and capacitance

C = 5 μ F

are connected in series to an

A C

source of frequency

50 Hz,

then at resonance the impedance of circuit is

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>EXERCISE>Q 16

In the circuit shown in the figure, neglecting source resistance, the voltmeter and ammeter readings will respectively be

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>EXERCISE>Q 17

In the circuit shown in figure the current measured by ammeter is

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>EXERCISE>Q 18

If reading of voltmeter $V$ shown in the figure at resonance is $200 V,$ then the quality factor of the circuit is

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>EXERCISE>Q 19

In an

ac

circuit,

V

and

I

are given by,

V = 100 \sin (100 t) volt

,

I = 100 \sin (100 t + \frac{π}{3}) mA

. The power dissipated in the circuit is

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>EXERCISE>Q 20

A transistor–oscillator using a resonant circuit with an inductor

L

(of negligible resistance) and a capacitor

C

in series produce oscillation of frequency

f

. If

L

is doubled and

C

is changed to

4 C

, the frequency will be:

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>EXERCISE>Q 21

An

L C R

series circuit with a resistance of

100

Ω

is connected to an ac source of

200 V

(r.m.s.) and angular frequency

300 rad s^{- 1}

. When only the capacitor is removed, the current lags behind the voltage by

60 °

. When only the inductor is removed, the current leads the voltage by

60 °

. The average power dissipated is

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>EXERCISE>Q 22

A capacitor of capacitance

1 μ F

is charged to a potential of

1 V .

It is connected in parallel to an inductor of inductance

10^{- 3} H .

The maximum current that will flow in the circuit has the value