Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 6

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There is no resistance in the inductive circuit. Kirchhoff 's voltage law for the circuit 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 7

When

100 V D C

is applied across a solenoid, a current of

1 A

flows in it. When

100 V A C

is applied across the same solenoid the current drops to

0.5 A

. If the frequency of the

A C

source is

50 Hz,

the impedance and inductance of the solenoid are

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 8

An inductive circuit contains a resistance of

10 Ω

and an inductance of

2.0 H

. If an AC voltage of

120 V

and frequency of

60 Hz

is applied to this circuit, the current in the circuit would be nearly,

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 9

A coil and a bulb are connected in series with a

12

volt direct current source. A soft iron core is now inserted into the coil. Then

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 10

A sinusoidal supply of frequency

10 Hz

and r.m.s. voltage

12 V

is connected to a

2.1 μ F

capacitor. What is r.m.s. value of current?

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 11

In an

L C R

series circuit

R = 10 Ω, X_{L} = 8 Ω

and

X_{C} = 6 Ω

. The total impedance of the circuit is

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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 12

In a series

R L C

circuit, potential differences across

R, L

and

C

are

30 V, 60 V

and

100 V

respectively as shown in figure. The e.m.f. of source (in volts) is
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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 13

In a series

R L C

circuit, the r.m.s. voltage across the resistor and the inductor are respectively

400 V

and

700 V .

If the equation for the applied voltage is

ε = 500 \sqrt{2} \sin ω t,

then the peak voltage across the capacitor is
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Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-2>Q 14

In the following circuit, the emf of source is,

E_{0} = 200 V, R = 20 Ω, L = 0.1 H, C = 10.6 F

and frequency is variable then the current at frequency,

f = 0

and

f = \infty

is

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