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

The phase difference between the current and voltage at resonce is:

Question # 2

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

Question # 3

Unit of impedance is:

Question # 4

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

Question # 5

X1is low for low frequency Fy but Xc is.

Question # 6

The internal resistance of a capacitor is called:

Question # 7

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 # 8

The circuit which compares the two voltages is.

Question # 9

The peak to peak value of alternating voltage is

Question # 10

Choke consumes extremely small

Question # 11

The natural frequency of L.C circuit is equal to

Question # 12

In three phase voltage across any two lines is about.

Question # 13

The combined effect of resistance and reactance in circuit is called:

Question # 14

SI unit of reactance is.

Question # 15

The AC system is preferred to DC system because:

Question # 16

A capacitor is perfectly insulator for:

Question # 17

In LR circiut which one of the following statements is correct?

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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 An in cudutor may store energy in
A. Its magnetic field
B. Its coil
C. Its electric field
D. A neighboring circuit
2 If Io is the peak value of current, then its root mean square value is given by
B. 2 Io
C. Io
D. 0.7 Io
3 The device which allows only the flow of D.C. is.
A. Capacitors
B. transformer
C. Inductor
D. Generator
4 The flow of D.C current is opposed by
A. Resistor
B. Induction
C. Capacitor
D. All of these
5 Average value of current and voltage over a complete cycle is.
A. Positive
B. Negative
C. Zero
D. Infinite
6 The electromagnetic spectrum contains
A. Radio waves
B. X-rays
C. Microwaves
D. All of these
7 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
8 The expression P = VI hold only when current and voltage are.
A. In phase
B. Out of phase
C. At right angle to each other
D. At angle of 120 o
9 The circuit in which current and voltage are in phase, the power factor is:
A. Zero
B. 1
C. -1
D. 2
10 A capacitor is perfectly insulator for:
A. Direct current
B. Alternating current
C. Direct as well as alternating current
D. None of these

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