2nd Year Physics Chapter 16 Online MCQ Test for 12th Class Physics Chapter 16 (Alternating Current)

ICS Part 2 Physics
Chapter 16 Test

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Physics ICS Part 2 Chapter 16 Online MCQ's Test

00:00
Question # 1

The effective value of any sinusoidal alternating current or voltage is

Question # 2

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

Question # 3

The inductive reactance of a coil is direction proportional to.

Question # 4

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

Question # 5

In RLC circuit the energy is dissipated in

Question # 6

In three phase A.C supply coils are inclined at an angle of.

Question # 7

In modulation, low frequency signal is known as

Question # 8

In metal detector, we use.

Question # 9

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

Question # 10

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

Question # 11

The device which allows only the flow of D.C. is.

Question # 12

The AC system is preferred to DC system because:

Question # 13

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

Question # 14

The sum of positive and negative peak value called.

Question # 15

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

Question # 16

X1is low for low frequency Fy but Xc is.

Question # 17

Unit of impedance is:

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ICS 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 phase difference between current and voltage in an inductive circuit is.
A. zero
B. 90 o
C. 180 o
D. 45o
2 Resistance of choke is
A. zero
B. Large
C. Very small
D. Infinite
3 The wave form of alternating voltage is a
A. Cotangent curve
B. Cosine curve
C. Sine curve
D. Tangent curve
4 For electromagnetic waves, Maxwell generalized
A. Gauses law for magnetism
B. Gauses law for eletricity
C. Fradays law
D. Amperes law
5 In A.C circuit of inductor which one is true
A. Voltage leads current by phase angle π/2
B. Voltage lags current by π/2
C. Current leads voltage by π/2
D. Both remain in phase
6 The reactance is the ratio of
A. Vrms/Irms
B. Vrms x Irms
C. Irms/Vrms
D. Vmax x Vrms
7 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
8 100 micro F capacitor is connects to an AC voltage 24 V and frequency 50 Hz. The reactance of the capacitor is.
A. 30.8 Ohm
B. 31.8 Ohm
C. 34.8 Ohm
D. 40 Ohm
9 Xc =
A. 1/2πfc
B. 2πfc
C. 2π/fc
D. fc/2π
10 The phase difference between the current and voltage at resonce is:
A. 0
B. π
C. -π
D. π/2

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