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 flow of D.C current is opposed by

Question # 2

The peak to peak value of alternating voltage is

Question # 3

In case of capacitor, the unit of reactance is

Question # 4

The condition of resonance is:

Question # 5

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

Question # 6

Vrms =

Question # 7

Radio frequency choke is

Question # 8

SI unit of reactance is.

Question # 9

In frequency modulation which factor changed.

Question # 10

Xc =

Question # 11

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

Question # 12

Direct current can not flow through.

Question # 13

The resonance frequency is given by:

Question # 14

The value of capacitive reactance is given by

Question # 15

At high frequency, the current through a capacitor is

Question # 16

The power factor of RL series circuit is.

Question # 17

A capacitor is perfectly insulator for:

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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 the current and voltage at resonce is:
A. 0
B. π
C. -π
D. π/2
2 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
3 The flow of D.C current is opposed by
A. Resistor
B. Induction
C. Capacitor
D. All of these
4 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
5 when an inductor comes close to a metallic object, its inductance is.
A. Decreased
B. Increased
C. Becomes half
D. Becomes 4 times
6 The value of capacitive reactance is given by
A. Xc = VI
B. xc= 1/wc or xc= wL
C. xc= 1*wc or xc=Lw
D. All of above
7 100 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
8 The mean value of A.C. in a cycle is.
A. 1
B. 0
C. I2
D. Nil
9 An electromagnetic wave goes from air to glass which of the following does not change?
A. Radio waves
B. X-rays
C. Ultra violet radiation
D. Ultra sond waves
10 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

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