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

In Series resonance circuit the impedance of circuit art resonance frequency, is

Question # 2

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

Question # 3

The main use of A.C is

Question # 4

Which consumes small power.

Question # 5

During each cycle A.C. voltage reaches a peak value.

Question # 6

The value of capacitive reactance is given by

Question # 7

SI unit of reactance is.

Question # 8

100 micro F capacitor is connects to an AC voltage 24 V and frequency 50 Hz. The reactance of the capacitor is.

Question # 9

The reactance is the ratio of

Question # 10

In RLC series circuit at resonance the phase difference between capacitor and inductor reactance is.

Question # 11

The electromagnetic spectrum contains

Question # 12

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

Question # 13

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

Question # 14

An A.C. voltmeter reads 220 V, its peak value will be

Question # 15

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

Question # 16

Unit of impedance is:

Question # 17

In metal detector, we use.

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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 In frequency modulation which factor changed.
A. Amplitude of charge carriers
B. Frequency of charge carriers
C. Amplitude of signal
D. Frequency of signal
2 At high frequency the value of reactance of capacitor will be.
A. Small
B. Zero
C. Large
D. Infinite
3 Power dissipation in A.C circuit is expressed as:
A. P =Irms x Vrms Sinθ
B. IxVCosθ
C. IrmsxVrmsCosθ
D. Irms x Vrms Sin2θ
4 Main reason for world wide use of A.C. is
A. It is cheaper
B. Transmitted
C. Botha a and b
D. Reaches in short time
5 The combined effect of resistance and reactance is knows as.
A. Inductance
B. Conductance
C. Resistance
D. Impedance
6 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
7 In purely resistive A.C circuit, instantaneous value of voltage and current:
A. Current lags behind voltage
B. Current leads voltage by π/2
C. Both are in Phase
D. Voltage leads current by Pase θ=π/2
8 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
9 The velocity of an oscillating charge as it moves to and fro along a wire is.
A. Changing
B. Constant
C. Infinite
D. zero
10 A resistance frequency the impedance of RLC parallel circuit is.
A. Zero
B. Infinite
C. Maximum
D. Minimum

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