2nd Year Physics Chapter 16 Online MCQ Test for 12th Class Physics Chapter 16 (Alternating Current)

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Physics ICS Part 2 Chapter 16 Online MCQ's Test

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Question # 1

The main use of A.C is

Question # 2

The internal resistance of a capacitor is called:

Question # 3

Which consumes small power.

Question # 4

The combined effect of resistance and reactance is knows as.

Question # 5

At high frequency, the current through a capacitor is

Question # 6

In modulation, low frequency signal is known as

Question # 7

For electromagnetic waves, Maxwell generalized

Question # 8

An alternating quantity (voltage or current) is completely known if we know its:

Question # 9

In three phase A.C supply coils are inclined at an angle of.

Question # 10

Electron vibrating 94,000 times each second will produce radio waves of frequency.

Question # 11

The reactance is the ratio of

Question # 12

The natural frequency of L.C circuit is equal to

Question # 13

During each cycle A.C. voltage reaches a peak value.

Question # 14

The most common source of an A.C. Voltage is.

Question # 15

In RLC circuit the energy is dissipated in

Question # 16

XL=

Question # 17

The flow of D.C current is opposed by

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 In metal detector, we use.
A. L-C circuit
B. R-L circuit
C. R-C circuit
D. RLC series circuit
2 The peak to peak value of alternating voltage is
A. 2Vo
B. Vo
D. None of these
3 An A.C. voltmeter reads 220 V, its peak value will be
A. 225 V
B. 240 V
C. 311.12 V
D. 300 V
4 The condition of resonance is:
A. XL = 1/2 Xc
B. XL = Xc
C. Xc = 4x2
D. None of above
5 Xc =
A. 1/2πfc
B. 2πfc
C. 2π/fc
D. fc/2π
6 The wave form of alternating voltage is a
A. Cotangent curve
B. Cosine curve
C. Sine curve
D. Tangent curve
7 The circuit in which current and voltage are in phase, the power factor is:
A. Zero
B. 1
C. -1
D. 2
8 An alternating voltage is given by 20 sin 157 t. Th efrequency of alternating voltage is:
A. 50 Hz
B. 25Hz
C. 100 Hz
D. 75 Hz
9 For electromagnetic waves, Maxwell generalized
A. Gauses law for magnetism
B. Gauses law for eletricity
C. Fradays law
D. Amperes law
10 The resonance frequency is given by:
A. fr = 2π√LC
B. fr = 1/2πLC
C. fr = 1/ 2π√LC
D. f1 = 1/ 2πC√L

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