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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Physics ICS Part 2 Chapter 16 Online MCQ's Test

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Question # 1

In A.C circuit of inductor which one is true

Question # 2

Phase difference between V and I of an A.C through resistor is.

Question # 3

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

Question # 4

The peak to peak value of alternating voltage is

Question # 5

The unit of impedance is.

Question # 6

Choke consumes extremely small

Question # 7

The unit of impedance is

Question # 8

The circuit in which current and voltage are in phase, the power factor is:

Question # 9

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

Question # 10

Power dissipation in A.C circuit is expressed as:

Question # 11

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

Question # 12

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

Question # 13

The inductive reactance of a coil is direction proportional to.

Question # 14

If Vrms be the root mean square value of emf then its peak to peak value is given by

Question # 15

In metal detector, we use.

Question # 16

The resonance frequency is given by:

Question # 17

A capacitor is perfectly insulator for:

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16th Chapter

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 In A.C circuit through a capacitor which one is:
A. Current leads voltage by 90
B. Current lags behind voltage by 90
C. Both will be in phase
D. None of above 
2 Radio frequency choke is
A. Iron cored
B. Air Cored
C. Air as well as iron cored
D. None of these
3 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
4 Unit of impedance is:
A. Ohm
B. Ohm-1
C. no unit
D. Ohm m-1
5 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
6 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
7 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
8 In frequency modulation which factor changed.
A. Amplitude of charge carriers
B. Frequency of charge carriers
C. Amplitude of signal
D. Frequency of signal
9 Average value of current and voltage over a complete cycle is.
A. Positive
B. Negative
C. Zero
D. Infinite
10 Power dissipation in A.C circuit is expressed as:
A. P =Irms x Vrms Sinθ
B. IxVCosθ
C. IrmsxVrmsCosθ
D. Irms x Vrms Sin2θ

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