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

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

Question # 2

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

Question # 3

Unit of impedance is:

Question # 4

In frequency modulation which factor changed.

Question # 5

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

Question # 6

Direct current can not flow through.

Question # 7

Choke consumes extremely small

Question # 8

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

Question # 9

The unit of impedance is.

Question # 10

In frequency modulation, the amplitude of carrier waves is

Question # 11

Electron vibrating 94,000 times each second will produce radio waves of frequency.

Question # 12

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

Question # 13

Resistance of choke is

Question # 14

For electromagnetic waves, Maxwell generalized

Question # 15

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

Question # 16

The power factor of RL series circuit is.

Question # 17

The resonance frequency is given by:

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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 Xc =
A. 1/2πfc
B. 2πfc
C. 2π/fc
D. fc/2π
2 An electromagnetic wave goes from air to glass which of the following does not change?
A. Radio waves
B. X-rays
C. Ultra violet radiation
D. Ultra sond waves
3 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
4 In chopke coil the resistance XL an resistance R are:
A. XL=R
B. XL<<R
C. XL>>R
D. XL=
5 Unit of impedance is:
A. Ohm
B. Ohm-1
C. no unit
D. Ohm m-1
6 Impedance is denoted by:
A. A 
B. Z
C. P
D. Q
7 The most common source of an A.C. Voltage is.
A. Motor
B. Cell
C. Generator
D. Thermo couple
8 The device which allows only the flow of D.C. is.
A. Capacitors
B. transformer
C. Inductor
D. Generator
9 If Io is the peak value of current, then its root mean square value is given by
B. 2 Io
C. Io
D. 0.7 Io
10 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

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