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

Xc =

Question # 2

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

Question # 3

The power factor of RL series circuit is.

Question # 4

The highest value reached by the voltage or current in one cycle is called.

Question # 5

Unit of impedance is:

Question # 6

An electromagnetic wave goes from air to glass which of the following does not change?

Question # 7

The mean value of A.C. in a cycle is.

Question # 8

The AC system is preferred to DC system because:

Question # 9

The phase difference between current and voltage in an inductive circuit is.

Question # 10

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

Question # 11

In A.C circuit of inductor which one is true

Question # 12

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

Question # 13

The inductive reactance of a coil is direction proportional to.

Question # 14

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

Question # 15

In metal detector, we use.

Question # 16

An alternating quantity (voltage or current) is completely known if we know its:

Question # 17

The reactance of inductor depends upon

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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 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
2 The Basic circuit element in a D.C. circuits which controls the current and voltage is
A.
Resistor
B. Inductor
C.
Capisitor
D. Transistor
3 Xc =
A. 1/2πfc
B. 2πfc
C. 2π/fc
D. fc/2π
4 The reactance is the ratio of
A. Vrms/Irms
B. Vrms x Irms
C. Irms/Vrms
D. Vmax x Vrms
5 In an LRC circiut, the capacitance is made one-fourth, when an resonance . Then what should be change in inductance, so that the circuit remain in resonance?
A. 4 times
B. 1/4 times
C. 8 times
D. 2 times
6 The A.M. transmission frequencies range from
A. 540 KHz to 1000 KHz
B. 540 Khz to 1600 KHz
C. 520 KHz TO 1600 KHz
D. 520 KHz TO 1400 KHz
7 The sum of positive and negative peak value called.
A. R.M.S. value
B. P-P value
C. Peak value
D. Average value
8 In three phase voltage across any two lines is about.
A. 220 V
B. 230 V
C. 400 V
D. 430 V
9 The effective value of any sinusoidal alternating current or voltage is
D. None of the above
10 The velocity of an oscillating charge as it moves to and fro along a wire is.
A. Changing
B. Constant
C. Infinite
D. zero

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