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 metal detector, we use.

Question # 2

In case of A.C. through resistor V and I are

Question # 3

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

Question # 4

The combined effect of resistance and reactance is knows as.

Question # 5

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

Question # 6

Unit of impedance is:

Question # 7

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

Question # 8

Vrms =

Question # 9

The main use of A.C is

Question # 10

Resistance of choke is

Question # 11

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

Question # 12

At high frequency, the current through a capacitor is

Question # 13

The AC system is preferred to DC system because:

Question # 14

The reactance is the ratio of

Question # 15

In three phase A.C. generator the phase difference between each pair of coil is.

Question # 16

XL=

Question # 17

Average value of current and voltage over a complete cycle 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 Power dissipation in A.C circuit is expressed as:
A. P =Irms x Vrms Sinθ
B. IxVCosθ
C. IrmsxVrmsCosθ
D. Irms x Vrms Sin2θ
2 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
3 In modulation, low frequency signal is known as
A. Carrier wave
B. fluctuated signal
C. Modulated carrier signal
D. Modulation signal
4 At resonance frequency, the impedance of RLC series circuit is.
A. Maximum
B. Minimum
C. Zero
D. Infinite
5 The natural frequency of L.C circuit is equal to
6 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
7 The device which allows only the continuous flow of AC through it is.
A. Inductor
B. Battery
C. Thermistor
D. Capacitor
8 The reactance is the ratio of
A. Vrms/Irms
B. Vrms x Irms
C. Irms/Vrms
D. Vmax x Vrms
9 In a pure inductive A.C. circuit the current.
A. Lags behind voltage by 90 o
B. Leads the voltage by 90 o
C. In phase with voltage
D. Leads the voltage by 270 o
10 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

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