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

The electromagnetic spectrum contains

Question # 2

Phase difference between V and I of an A.C through resistor is.

Question # 3

The AC system is preferred to DC system because:

Question # 4

Xc =

Question # 5

The inductive reactance of a coil is direction proportional to.

Question # 6

An inductor of 1 henry inductance has a reactance 500 ohms, then the frequency required is approximately

Question # 7

In case of capacitor, the unit of reactance is

Question # 8

Electron vibrating 94,000 times each second will produce radio waves of frequency.

Question # 9

In pure capacitor A.C. circuit, the current I and charge q are.

Question # 10

Direct current can not flow through.

Question # 11

The reactance of inductor depends upon

Question # 12

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

Question # 13

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

Question # 14

XL=

Question # 15

In a pure inductive A.C. circuit the current.

Question # 16

An in cudutor may store energy in

Question # 17

In AC system we generate sine wave form because:

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 The power factor of RL series circuit is.
A. 0
B. 1
C. Less then 1
D. More than one
2 In A.C circuit through a capacitor which one is:
A. Current leads voltage by 90∘
B. Current lags behind voltage by 90∘
C. Both will be in phase
D. None of above 
3 The electromagnetic spectrum contains
A. Radio waves
B. X-rays
C. Microwaves
D. All of these
4 Unit of impedance is:
A. Ohm
B. Ohm-1
C. no unit
D. Ohm m-1
5 Radio frequency choke is
A. Iron cored
B. Air Cored
C. Air as well as iron cored
D. None of these
6 Power dissipation is a pure inductive or in a pure capacitance circuit is:
A. 106
B. 0
C. 10∘
D. Maximum
7 Power dissipation in A.C circuit is expressed as:
A. P =Irms x Vrms Sinθ
B. IxVCosθ
C. IrmsxVrmsCosθ
D. Irms x Vrms Sin2θ
8 The phase difference between the current and voltage at resonce is:
A. 0
B. π
C. -π
D. π/2
9 The sum of positive and negative peak value called.
A. R.M.S. value
B. P-P value
C. Peak value
D. Average value
10 The peak value of alternating current is 5√2 A. The mean square value of current will be:
A. 5A
B. 2.5A
C. 5√2A
D. 52

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