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

X1is low for low frequency Fy but Xc is.

Question # 2

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

Question # 3

The combined effect of resistance and reactance in circuit is called:

Question # 4

The unit of impedance is

Question # 5

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

Question # 6

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

Question # 7

If the frequency of A.C. supplied is doubled then the capacitive reactance becomes.

Question # 8

Direct current can not flow through.

Question # 9

The wave form of alternating voltage is a

Question # 10

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

Question # 11

Average value of current and voltage over a complete cycle is.

Question # 12

The condition of resonance is:

Question # 13

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

Question # 14

High frequency radio wave is called as

Question # 15

The reactance of inductor depends upon

Question # 16

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

Question # 17

The effective value of any sinusoidal alternating current or voltage is

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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 The wave form of alternating voltage is a
A. Cotangent curve
B. Cosine curve
C. Sine curve
D. Tangent curve
2 The reactance is the ratio of
A. Vrms/Irms
B. Vrms x Irms
C. Irms/Vrms
D. Vmax x Vrms
3 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
4 The unit of impedance is.
A. Henry
B. Hertz
C. Ampere
D. Ohm
5 In Series resonance circuit the impedance of circuit art resonance frequency, is
A. Maximum
B. Minimum
C. It is unequal to R
D. None of above
6 The peak to peak value of alternating voltage is
A. 2Vo
B. Vo
D. None of these
7 The phase difference between current and voltage in an inductive circuit is.
A. zero
B. 90 o
C. 180 o
D. 45o
8 when an inductor comes close to a metallic object, its inductance is.
A. Decreased
B. Increased
C. Becomes half
D. Becomes 4 times
9 X1is low for low frequency Fy but Xc is.
A. Zero
B. Low
C. High
D. Same is H
10 The resonance frequency is given by:
A. fr = 2π√LC
B. fr = 1/2πLC
C. fr = 1/ 2π√LC
D. f1 = 1/ 2πC√L

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