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

Question # 3

The internal resistance of a capacitor is called:

Question # 4

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

Question # 5

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

Question # 6

Impedance is denoted by:

Question # 7

The resonance frequency is given by:

Question # 8

The most common source of an A.C. Voltage is.

Question # 9

XL=

Question # 10

Direct current can not flow through.

Question # 11

An inductor of 1 henry inductance has a reactance 500 ohms, then the frequency required is approximately

Question # 12

The device which allows only the continuous flow of AC through it is.

Question # 13

The phase angle of a series RLC circult at resonant frequency is

Question # 14

The peak value of A.C source is 20 A, then its rms value will be.

Question # 15

The combined effect of resistance and reactance is knows as.

Question # 16

At high frequency, the current through a capacitor is

Question # 17

At resonance frequency, the impedance of RLC series circuit 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 X1is low for low frequency Fy but Xc is.
A. Zero
B. Low
C. High
D. Same is H
2 Resistance of choke is
A. zero
B. Large
C. Very small
D. Infinite
3 The peak value of alternating current is 5√2 A. The mean square value of current will be:
A. 5A
B. 2.5A
C. 5√2A
D. 52
4 Impedance is denoted by:
A. A 
B. Z
C. P
D. Q
5 In LR circiut which one of the following statements is correct?
A. L and R opposes each other
B. R value increases with frequency
C. The inductive reactance increases with frequency
D. The inductive reactance decreases with frequency
6 The phase difference between the current and voltage at resonce is:
A. 0
B. π
C. -π
D. π/2
7 The unit of impedance is.
A. Henry
B. Hertz
C. Ampere
D. Ohm
8 An alternating voltage is given by 20 sin 157 t. Th efrequency of alternating voltage is:
A. 50 Hz
B. 25Hz
C. 100 Hz
D. 75 Hz
9 In the capacitive circuit of A.C. quantity when q= 0 the slope of q-t curve is.
A. Maximum
B. Minimum
C. Zero
D. Negative
10 The effective value of any sinusoidal alternating current or voltage is
D. None of the above

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