2nd Year Physics Chapter 16 Online MCQ Test for 12th Class Physics Chapter 16 (Alternating Current)

ICS Part 2 Physics
Chapter 16 Test

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

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Physics ICS Part 2 Chapter 16 Online MCQ's Test

00:00
Question # 1

Direct current can not flow through.

Question # 2

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

Question # 3

In A.C circuit of inductor which one is true

Question # 4

The power factor of RL series circuit is.

Question # 5

Power dissipated in a pure inductor is.

Question # 6

The effective value of any sinusoidal alternating current or voltage is

Question # 7

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

Question # 8

Choke consumes extremely small

Question # 9

The value of capacitive reactance is given by

Question # 10

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

Question # 11

The electromagnetic spectrum contains

Question # 12

Power dissipation is a pure inductive or in a pure capacitance circuit is:

Question # 13

The flow of D.C current is opposed by

Question # 14

The reactance of inductor depends upon

Question # 15

In chopke coil the resistance XL an resistance R are:

Question # 16

Radio frequency choke is

Question # 17

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

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ICS 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 The value of capacitive reactance is given by
A. Xc = VI
B. xc= 1/wc or xc= wL
C. xc= 1*wc or xc=Lw
D. All of above
2 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
3 If the frequency of A.C. supplied is doubled then the capacitive reactance becomes.
A. Half
B. Two
C. Four times
D. One fourth
4 Power dissipated in a pure inductor is.
A. Large
B. Small
C. Infinite
D. Zero
5 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
6 In Pakistan the frequency of A.C. supply is.
A. 50 Hz
B. 60 Hz
C. 45 Hz
D. 70 Hz
7 In case of A.C. through resistor V and I are
A. At 0 o with each other
B. At 180 o with each other
C. At 90 o with each other
D. At 270 o with each other
8 In chopke coil the resistance XL an resistance R are:
A. XL=R
B. XL<<R
C. XL>>R
D. XL=
9 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)
10 In RLC series circuit at resonance the phase difference between capacitor and inductor reactance is.
A. 90o
B. 270o
C. 0o
D. 180o

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