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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MCQ's Test For Chapter 0 "Physics FSC Part 2 Chapter 16 Online MCQ's Test"

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Physics FSC Part 2 Chapter 16 Online MCQ's Test

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Question # 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?

Question # 2

The combined effect of resistance and reactance is knows as.

Question # 3

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

Question # 4

The phase difference between current and voltage in an inductive circuit is.

Question # 5

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

Question # 6

The value of capacitive reactance is given by

Question # 7

Which consumes small power.

Question # 8

In frequency modulation which factor changed.

Question # 9

The A.M. transmission frequencies range from

Question # 10

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

Question # 11

The condition of resonance is:

Question # 12

Xc =

Question # 13

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

Question # 14

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

Question # 15

Impedance is denoted by:

Question # 16

The resonance frequency is given by:

Question # 17

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

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 In three phase voltage across any two lines is about.
A. 220 V
B. 230 V
C. 400 V
D. 430 V
2 The most common source of an A.C. Voltage is.
A. Motor
B. Cell
C. Generator
D. Thermo couple
3 Unit of impedance is:
A. Ohm
B. Ohm-1
C. no unit
D. Ohm m-1
4 In purely resistive A.C circuit, instantaneous value of voltage and current:
A. Current lags behind voltage
B. Current leads voltage by π/2
C. Both are in Phase
D. Voltage leads current by Pase θ=π/2
5 Direct current can not flow through.
A. Inductor
B. Resistor
C. Transistor
D. Capacitor
6 A capacitor is perfectly insulator for:
A. Direct current
B. Alternating current
C. Direct as well as alternating current
D. None of these
7 XL=
A. 2πfL
B. 1/2πfL
C. 2πfL
D. fL/2π
8 The AC system is preferred to DC system because:
A. AC voltage can be easily changed in magnitude
B. DC motor angular velocity is affected badly
C. High voltage AC transmission is less efficient
D. Domestic appliance require AC voltage for their operation
9 An inductor of 1 henry inductance has a reactance 500 ohms, then the frequency required is approximately
A. 50 Hz
B. 100 Hz
C. 80 Hz
D. 120 Hz
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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