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

Question # 2

The Basic circuit element in a D.C. circuits which controls the current and voltage is

Question # 3

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

Question # 4

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

Question # 5

The power factor of RL series circuit is.

Question # 6

An electromagnetic wave goes from air to glass which of the following does not change?

Question # 7

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

Question # 8

The most common source of an A.C. Voltage is.

Question # 9

In A.C circuit through a capacitor which one is:

Question # 10

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

Question # 11

An in cudutor may store energy in

Question # 12

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

Question # 13

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 # 14

The sum of positive and negative peak value called.

Question # 15

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

Question # 16

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

Question # 17

The velocity of an oscillating charge as it moves to and fro along a wire 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 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
2 In three phase voltage across any two lines is about.
A. 220 V
B. 230 V
C. 400 V
D. 430 V
3 The peak value of alternating current is 5√2 A. The mean square value of current will be:
A. 5A
B. 2.5A
C. 5√2A
D. 52
4 Which consumes small power.
A. Inductor
B. Resistor
C. Motor
D. All of these
5 The inductive reactance of a coil is direction proportional to.
A. Inductance
B. Resistance
C. Frequency of A.C.
D. Both frequency of A.C. and inductance
6 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
7 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)
8 The basic circuit element in A.C. circuit which controls current.
A. Resistor only
B. Capacitor only
C. Inductor only
D. All of these
9 The velocity of an oscillating charge as it moves to and fro along a wire is.
A. Changing
B. Constant
C. Infinite
D. zero
10 The internal resistance of a capacitor is called:
A. Impedance
B. Resistance
C. Reactance
D. Conductance

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