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

When 10 V are applied to an A.C circuit, the current flowing in it is 100 mA. It impedance is.

Question # 2

If Vrms be the root mean square value of emf then its peak to peak value is given by

Question # 3

The main use of A.C is

Question # 4

The AC system is preferred to DC system because:

Question # 5

The electromagnetic spectrum contains

Question # 6

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

Question # 7

The value of capacitive reactance is given by

Question # 8

The flow of D.C current is opposed by

Question # 9

The A.M. transmission frequencies range from

Question # 10

The effective value of any sinusoidal alternating current or voltage is

Question # 11

The combined effect of resistance and reactance is knows as.

Question # 12

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

Question # 13

The internal resistance of a capacitor is called:

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

At resonance, the behavior of R-L-C series circuit is.

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FSC 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 An in cudutor may store energy in
A. Its magnetic field
B. Its coil
C. Its electric field
D. A neighboring circuit
2 The peak value of A.C source is 20 A, then its rms value will be.
A. 14.1 A
B. 10 A
C. 20 A
D. 28.2 A
3 The peak to peak value of alternating voltage is
A. 2Vo
B. Vo
D. None of these
4 The reactance is the ratio of
A. Vrms/Irms
B. Vrms x Irms
C. Irms/Vrms
D. Vmax x Vrms
5 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
6 In LR circiut which one of the following statements is correct?
A. L and R opposes each other
B. R value increases with frequency
C. The inductive reactance increases with frequency
D. The inductive reactance decreases with frequency
7 In metal detector, we use.
A. L-C circuit
B. R-L circuit
C. R-C circuit
D. RLC series circuit
8 In the capacitive circuit of A.C. quantity when q= 0 the slope of q-t curve is.
A. Maximum
B. Minimum
C. Zero
D. Negative
9 In Pakistan the frequency of A.C. supply is.
A. 50 Hz
B. 60 Hz
C. 45 Hz
D. 70 Hz
10 The main reason for world wide use of A.C is because:
A. It is very high power 
B. It can be transmitted over long distance
C. It is cheaper to use
D. ALl of above

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