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

Impedance is denoted by:

Question # 2

At high frequency, the current through a capacitor is

Question # 3

At resonance, the behavior of R-L-C series circuit is.

Question # 4

In case of capacitor, the unit of reactance is

Question # 5

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

Question # 6

Which consumes small power.

Question # 7

Resistance of choke is

Question # 8

The peak to peak value of alternating voltage is

Question # 9

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

Question # 10

Power dissipated in a pure inductor is.

Question # 11

In frequency modulation, the amplitude of carrier waves is

Question # 12

The unit of impedance is

Question # 13

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

Question # 14

100 micro F capacitor is connects to an AC voltage 24 V and frequency 50 Hz. The reactance of the capacitor is.

Question # 15

The main use of A.C is

Question # 16

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

Question # 17

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

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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 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
2 During each cycle A.C. voltage reaches a peak value.
A. Once
B. Twice
C. Thrice
D. Four time
3 Power dissipation in A.C circuit is expressed as:
A. P =Irms x Vrms Sinθ
B. IxVCosθ
C. IrmsxVrmsCosθ
D. Irms x Vrms Sin2θ
4 If the frequency of A.C. supplied is doubled then the capacitive reactance becomes.
A. Half
B. Two
C. Four times
D. One fourth
5 In RLC circuit the energy is dissipated in
A. R only
B. R and L
C. R and C
D. L and C
6 X1is low for low frequency Fy but Xc is.
A. Zero
B. Low
C. High
D. Same is H
7 The most common source of an A.C. Voltage is.
A. Motor
B. Cell
C. Generator
D. Thermo couple
8 Main reason for world wide use of A.C. is
A. It is cheaper
B. Transmitted
C. Botha a and b
D. Reaches in short time
9 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
10 The circuit in which current and voltage are in phase, the power factor is:
A. Zero
B. 1
C. -1
D. 2

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