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

ICS Part 2 Physics
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MCQ's Test For Chapter 0 "Physics ICS Part 2 Chapter 16 Online MCQ's Test"

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Physics ICS Part 2 Chapter 16 Online MCQ's Test

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Question # 1

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

Question # 2

The Basic circuit element in a D.C. circuits which controls the current and voltage is

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

The unit of impedance is

Question # 7

The slope of q-t curve at any instant of time gives.

Question # 8

The expression P = VI hold only when current and voltage are.

Question # 9

XL=

Question # 10

In metal detector, we use.

Question # 11

A resistance frequency the impedance of RLC parallel circuit is.

Question # 12

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 # 13

Radio frequency choke is

Question # 14

In three phase A.C. generator the phase difference between each pair of coil is.

Question # 15

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

Question # 16

The velocity of an oscillating charge as it moves to and fro along a wire is.

Question # 17

The phase angle of a series RLC circult at resonant frequency is

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 The combined effect of resistance and reactance is knows as.
A. Inductance
B. Conductance
C. Resistance
D. Impedance
2 The A.M. transmission frequencies range from
A. 540 KHz to 1000 KHz
B. 540 Khz to 1600 KHz
C. 520 KHz TO 1600 KHz
D. 520 KHz TO 1400 KHz
3 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?
A. 4 times
B. 1/4 times
C. 8 times
D. 2 times
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 resonance frequency is given by:
A. fr = 2π√LC
B. fr = 1/2πLC
C. fr = 1/ 2π√LC
D. f1 = 1/ 2πC√L
6 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
7 In AC system we generate sine wave form because:
A. It san be easily draw
B. It produces least disturbance in electrical circuits
C. It is nature standard
D. Other waves cannot be produced easily
8 The phase difference between the current and voltage at resonce is:
A. 0
B. π
C. -π
D. π/2
9 At resonance frequency, the impedance of RLC series circuit is.
A. Maximum
B. Minimum
C. Zero
D. Infinite
10 In RLC series circuit at resonance the phase difference between capacitor and inductor reactance is.
A. 90o
B. 270o
C. 0o
D. 180o

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