Second Year Physics Chapter 16 Online MCQ Test for 2nd Year Physics Chapter 16 Alternating Current Preparation

FSC Part 2 Physics
Chapter 16 Test

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Physics FSC Part 2 Chapter 16 Online MCQ's Test

00:00
Question # 1

An A.C. voltmeter reads 220 V, its peak value will be

Question # 2

Power dissipation is a pure inductive or in a pure capacitance circuit is:

Question # 3

The highest value reached by the voltage or current in one cycle is called.

Question # 4

In A.C circuit of inductor which one is true

Question # 5

The inductive reactance of a coil is direction proportional to.

Question # 6

At high frequency, the current through a capacitor is

Question # 7

Direct current can not flow through.

Question # 8

The power factor of RL series circuit is.

Question # 9

The resonance frequency is given by:

Question # 10

At high frequency the value of reactance of capacitor will be.

Question # 11

SI unit of reactance is.

Question # 12

Radio frequency choke is

Question # 13

The peak value of alternating current is 5√2 A. The mean square value of current will be:

Question # 14

If Vrms be the root mean square value of emf then its peak to peak value is given by

Question # 15

The peak value of A.C source is 20 A, then its rms value will be.

Question # 16

In an LRC circiut, the capacitance is made one-fourth, when an resonance . Then what should be change in inductance, so that the circuit remain in resonance?

Question # 17

An electromagnetic wave goes from air to glass which of the following does not change?

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FSC Part 2 Physics Chapter 16 Online Test MCQ's

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 Xc =
A. 1/2πfc
B. 2πfc
C. 2π/fc
D. fc/2π
2 Electron vibrating 94,000 times each second will produce radio waves of frequency.
A. 94 Hz
B. 940 HZ
C. 94 Hz
D. 490 Hz
3 An inductor of 1 henry inductance has a reactance 500 ohms, then the frequency required is approximately
A. 50 Hz
B. 100 Hz
C. 80 Hz
D. 120 Hz
4 In A.C circuit through a capacitor which one is:
A. Current leads voltage by 90∘
B. Current lags behind voltage by 90∘
C. Both will be in phase
D. None of above 
5 The circuit in which current and voltage are in phase, the power factor is:
A. Zero
B. 1
C. -1
D. 2
6 If the frequency of A.C. supplied is doubled then the capacitive reactance becomes.
A. Half
B. Two
C. Four times
D. One fourth
7 In three phase A.C supply coils are inclined at an angle of.
A. 0o
B. 90o
C. 120o
D. 80o
8 In three phase voltage across any two lines is about.
A. 220 V
B. 230 V
C. 400 V
D. 430 V
9 Power dissipation is a pure inductive or in a pure capacitance circuit is:
A. 106
B. 0
C. 10∘
D. Maximum
10 At resonance frequency, the impedance of RLC series circuit is.
A. Maximum
B. Minimum
C. Zero
D. Infinite

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