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 peak value of A.C source is 20 A, then its rms value will be.

Question # 2

For electromagnetic waves, Maxwell generalized

Question # 3

The peak value of alternating current is 5√2 A. The mean square value of current will be:

Question # 4

Resistance of choke is

Question # 5

Power dissipation is a pure inductive or in a pure capacitance circuit is:

Question # 6

Power dissipation in A.C circuit is expressed as:

Question # 7

In case of capacitor, the unit of reactance is

Question # 8

The main reason for world wide use of A.C is because:

Question # 9

Choke consumes extremely small

Question # 10

The basic circuit element in A.C. circuit which controls current.

Question # 11

In metal detector, we use.

Question # 12

At high frequency, the current through a capacitor is

Question # 13

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

Question # 14

when an inductor comes close to a metallic object, its inductance is.

Question # 15

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

Question # 16

In chopke coil the resistance XL an resistance R are:

Question # 17

100 micro F capacitor is connects to an AC voltage 24 V and frequency 50 Hz. The reactance of the capacitor 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 The AC system is preferred to DC system because:
A. AC voltage can be easily changed in magnitude
B. DC motor angular velocity is affected badly
C. High voltage AC transmission is less efficient
D. Domestic appliance require AC voltage for their operation
2 The wave form of alternating voltage is a
A. Cotangent curve
B. Cosine curve
C. Sine curve
D. Tangent curve
3 The electromagnetic spectrum contains
A. Radio waves
B. X-rays
C. Microwaves
D. All of these
4 Average value of current and voltage over a complete cycle is.
A. Positive
B. Negative
C. Zero
D. Infinite
5 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
6 Which consumes small power.
A. Inductor
B. Resistor
C. Motor
D. All of these
7 The mean value of A.C. in a cycle is.
A. 1
B. 0
C. I2
D. Nil
8 The natural frequency of L.C circuit is equal to
9 In Pakistan the frequency of A.C. supply is.
A. 50 Hz
B. 60 Hz
C. 45 Hz
D. 70 Hz
10 In RLC series circuit at resonance the phase difference between capacitor and inductor reactance is.
A. 90o
B. 270o
C. 0o
D. 180o

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