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

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Question # 1

At high frequency, the current through a capacitor is

Question # 2

The device which allows only the flow of D.C. is.

Question # 3

The condition of resonance is:

Question # 4

An alternating voltage is given by 20 sin 157 t. Th efrequency of alternating voltage is:

Question # 5

The resonance frequency is given by:

Question # 6

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

Question # 7

The internal resistance of a capacitor is called:

Question # 8

In metal detector, we use.

Question # 9

At resonance frequency, the impedance of RLC series circuit is.

Question # 10

In purely resistive A.C circuit, instantaneous value of voltage and current:

Question # 11

Resistance of choke is

Question # 12

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

Question # 13

The value of capacitive reactance is given by

Question # 14

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

Question # 15

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

Question # 16

The main reason for world wide use of A.C is because:

Question # 17

In AC system we generate sine wave form because:

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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 The main reason for world wide use of A.C is because:
A. It is very high power 
B. It can be transmitted over long distance
C. It is cheaper to use
D. ALl of above
2 The peak value of A.C source is 20 A, then its rms value will be.
A. 14.1 A
B. 10 A
C. 20 A
D. 28.2 A
3 In three phase A.C. generator the phase difference between each pair of coil is.
A. 45o
B. 90o
C. 120o
D. 60o
4 X1is low for low frequency Fy but Xc is.
A. Zero
B. Low
C. High
D. Same is H
5 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
6 The velocity of an oscillating charge as it moves to and fro along a wire is.
A. Changing
B. Constant
C. Infinite
D. zero
7 In Series resonance circuit the impedance of circuit art resonance frequency, is
A. Maximum
B. Minimum
C. It is unequal to R
D. None of above
8 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
9 A capacitor is perfectly insulator for:
A. Direct current
B. Alternating current
C. Direct as well as alternating current
D. None of these
10 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

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