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

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

Question # 2

The basic circuit element in A.C. circuit which controls current.

Question # 3

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

Question # 4

Vrms =

Question # 5

The inductive reactance of a coil is direction proportional to.

Question # 6

The effective value of any sinusoidal alternating current or voltage is

Question # 7

At resonance frequency, the impedance of RLC series circuit is.

Question # 8

In modulation, low frequency signal is known as

Question # 9

In A.C circuit of inductor which one is true

Question # 10

The circuit which compares the two voltages is.

Question # 11

Choke consumes extremely small

Question # 12

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

Question # 13

The combined effect of resistance and reactance is knows as.

Question # 14

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

Question # 15

In the capacitive circuit of A.C. quantity when q= 0 the slope of q-t curve is.

Question # 16

The flow of D.C current is opposed by

Question # 17

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

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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 SI unit of reactance is.
A. Ohm
B. Mho
C. Farad
D. Henry
2 In frequency modulation, the amplitude of carrier waves is
A. Increases
B. Remains constant
C. Decreases
D. None of these
3 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 
4 Impedance is denoted by:
A. A 
B. Z
C. P
D. Q
5 Average value of current and voltage over a complete cycle is.
A. Positive
B. Negative
C. Zero
D. Infinite
6 Unit of impedance is:
A. Ohm
B. Ohm-1
C. no unit
D. Ohm m-1
7 The expression P = VI hold only when current and voltage are.
A. In phase
B. Out of phase
C. At right angle to each other
D. At angle of 120 o
8 An A.C. voltmeter reads 220 V, its peak value will be
A. 225 V
B. 240 V
C. 311.12 V
D. 300 V
9 Xc =
A. 1/2πfc
B. 2πfc
C. 2π/fc
D. fc/2π
10 Power dissipated in a pure inductor is.
A. Large
B. Small
C. Infinite
D. Zero

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