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

The wave form of alternating voltage is a

Question # 2

The unit of impedance is

Question # 3

The resonance frequency is given by:

Question # 4

Radio frequency choke is

Question # 5

Which consumes small power.

Question # 6

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

Question # 7

In Pakistan the frequency of A.C. supply is.

Question # 8

XL=

Question # 9

In three phase voltage across any two lines is about.

Question # 10

In purely resistive A.C circuit, instantaneous value of voltage and current:

Question # 11

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

Question # 12

High frequency radio wave is called as

Question # 13

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

Question # 14

Resistance of choke is

Question # 15

In case of capacitor, the unit of reactance is

Question # 16

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

Question # 17

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

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 The power factor of RL series circuit is.
A. 0
B. 1
C. Less then 1
D. More than one
2 In three phase A.C supply coils are inclined at an angle of.
A. 0o
B. 90o
C. 120o
D. 80o
3 Power dissipated in a pure inductor is.
A. Large
B. Small
C. Infinite
D. Zero
4 The flow of D.C current is opposed by
A. Resistor
B. Induction
C. Capacitor
D. All of these
5 The phase difference between the current and voltage at resonce is:
A. 0
B. π
C. -π
D. π/2
6 X1is low for low frequency Fy but Xc is.
A. Zero
B. Low
C. High
D. Same is H
7 A resistance frequency the impedance of RLC parallel circuit is.
A. Zero
B. Infinite
C. Maximum
D. Minimum
8 At resonance frequency, the impedance of RLC series circuit is.
A. Maximum
B. Minimum
C. Zero
D. Infinite
9 Electron vibrating 94,000 times each second will produce radio waves of frequency.
A. 94 Hz
B. 940 HZ
C. 94 Hz
D. 490 Hz
10 The mean value of A.C. in a cycle is.
A. 1
B. 0
C. I2
D. Nil

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