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

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Question # 1

In case of capacitor, the unit of reactance is

Question # 2

The unit of impedance is.

Question # 3

If Io is the peak value of current, then its root mean square value is given by

Question # 4

In modulation, low frequency signal is known as

Question # 5

At high frequency, the current through a capacitor is

Question # 6

At high frequency the value of reactance of capacitor will be.

Question # 7

Electro magnetic waves emitted from radio antenna are.

Question # 8

An in cudutor may store energy in

Question # 9

High frequency radio wave is called as

Question # 10

The phase difference between the current and voltage at resonce is:

Question # 11

In AC system we generate sine wave form because:

Question # 12

In LR circiut which one of the following statements is correct?

Question # 13

SI unit of reactance is.

Question # 14

The AC system is preferred to DC system because:

Question # 15

A resistance frequency the impedance of RLC parallel circuit is.

Question # 16

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

Question # 17

The expression P = VI hold only when current and voltage are.

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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 X1is low for low frequency Fy but Xc is.
A. Zero
B. Low
C. High
D. Same is H
2 At high frequency, the current through a capacitor is
A. Small
B. Infinity
C. Zero
D. Large
3 In metal detector, we use.
A. L-C circuit
B. R-L circuit
C. R-C circuit
D. RLC series circuit
4 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
5 XL=
A. 2πfL
B. 1/2πfL
C. 2πfL
D. fL/2π
6 In RLC series circuit at resonance the phase difference between capacitor and inductor reactance is.
A. 90o
B. 270o
C. 0o
D. 180o
7 Electro magnetic waves emitted from radio antenna are.
A. Stationary
B. Longitudinal
C. Transvers
D. Both a and b
8 In Series resonance circuit the impedance of circuit art resonance frequency, is
A. Maximum
B. Minimum
C. It is unequal to R
D. None of above
9 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
10 The main use of A.C is
A. Minimum line losses
B. Long distance transmission
C. Stepping up to required voltage only
D. Steeping down to required voltage only

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