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

Question # 2

In a pure inductive A.C. circuit the current.

Question # 3

The mean value of A.C. in a cycle is.

Question # 4

The internal resistance of a capacitor is called:

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

An inductor of 1 henry inductance has a reactance 500 ohms, then the frequency required is approximately

Question # 9

At high frequency, the current through a capacitor is

Question # 10

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

Question # 11

In frequency modulation which factor changed.

Question # 12

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

Question # 13

The flow of D.C current is opposed by

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

X1is low for low frequency Fy but Xc is.

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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 velocity of an oscillating charge as it moves to and fro along a wire is.
A. Changing
B. Constant
C. Infinite
D. zero
2 In RLC circuit the energy is dissipated in
A. R only
B. R and L
C. R and C
D. L and C
3 Phase difference between V and I of an A.C through resistor is.
A. Zero Degree
B. 90 o
C. 80o
D. 120o
4 The wave form of alternating voltage is a
A. Cotangent curve
B. Cosine curve
C. Sine curve
D. Tangent curve
5 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
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 The reactance of inductor depends upon
A. L
D. All of the above
8 Electro magnetic waves emitted from radio antenna are.
A. Stationary
B. Longitudinal
C. Transvers
D. Both a and b
9 An alternating quantity (voltage or current) is completely known if we know its:
A. Maximum
B. Frequency and phase
C. Effective value
D. Both (a) & (b)
10 The highest value reached by the voltage or current in one cycle is called.
A. Peak ot peak value
B. Peak value
C. Instantaneous value
D. Root mean square value

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