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

Question # 2

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

Question # 3

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

Question # 4

In case of A.C. through resistor V and I are

Question # 5

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

Question # 6

In Pakistan the frequency of A.C. supply is.

Question # 7

In case of capacitor, the unit of reactance is

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

The electromagnetic spectrum contains

Question # 13

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

Question # 14

SI unit of reactance is.

Question # 15

In pure capacitor A.C. circuit, the current I and charge q are.

Question # 16

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

Question # 17

The device which allows only the flow of D.C. 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 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
2 In case of capacitor, the unit of reactance is
A. Farad
B. Ohm
C. Newton
D. All of these
3 In modulation, low frequency signal is known as
A. Carrier wave
B. fluctuated signal
C. Modulated carrier signal
D. Modulation signal
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 If the frequency of A.C. supplied is doubled then the capacitive reactance becomes.
A. Half
B. Two
C. Four times
D. One fourth
6 Xc =
A. 1/2πfc
B. 2πfc
C. 2π/fc
D. fc/2π
7 A capacitor is perfectly insulator for:
A. Direct current
B. Alternating current
C. Direct as well as alternating current
D. None of these
8 The device which allows only the continuous flow of AC through it is.
A. Inductor
B. Battery
C. Thermistor
D. Capacitor
9 Choke consumes extremely small
A. Current
B. Charge
C. Power
D. Potential
10 Power dissipation is a pure inductive or in a pure capacitance circuit is:
A. 106
B. 0
C. 10
D. Maximum

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