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

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

Question # 2

If Io is the peak value of current, then its root mean square value is given by

Question # 3

Power dissipation in A.C circuit is expressed as:

Question # 4

The circuit which compares the two voltages is.

Question # 5

An A.C. voltmeter reads 220 V, its peak value will be

Question # 6

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

Question # 7

The flow of D.C current is opposed by

Question # 8

Vrms =

Question # 9

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

Question # 10

The natural frequency of L.C circuit is equal to

Question # 11

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

Question # 12

Xc =

Question # 13

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

Question # 14

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 # 15

Main reason for world wide use of A.C. is

Question # 16

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

Question # 17

An in cudutor may store energy in

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FSC Part 2 Physics Chapter 16 Online Test MCQ's

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FSc Part II Class Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 100 micro F capacitor is connects to an AC voltage 24 V and frequency 50 Hz. The reactance of the capacitor is.
A. 30.8 Ohm
B. 31.8 Ohm
C. 34.8 Ohm
D. 40 Ohm
2 The highest value reached by the voltage or current is one cycle is called:
A. Peak to peak value
B. Peak value
C.
Instantaneous value
D. Root mean square value
3 Which consumes small power.
A. Inductor
B. Resistor
C. Motor
D. All of these
4 The main use of A.C is
A. Minimum line losses
B. Long distance transmission
C. Stepping up to required voltage only
D. Steeping down to required voltage only
5 The unit of impedance is.
A. Henry
B. Hertz
C. Ampere
D. Ohm
6 when an inductor comes close to a metallic object, its inductance is.
A. Decreased
B. Increased
C. Becomes half
D. Becomes 4 times
7 Resistance of choke is
A. zero
B. Large
C. Very small
D. Infinite
8 In the capacitive circuit of A.C. quantity when q= 0 the slope of q-t curve is.
A. Maximum
B. Minimum
C. Zero
D. Negative
9 Phase difference between V and I of an A.C through resistor is.
A. Zero Degree
B. 90 o
C. 80o
D. 120o
10 The A.M. transmission frequencies range from
A. 540 KHz to 1000 KHz
B. 540 Khz to 1600 KHz
C. 520 KHz TO 1600 KHz
D. 520 KHz TO 1400 KHz

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