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Online Tests
Physics Fsc Part 2 Chapter 5 Online Test MCQs With Answers
Question # 1
The most common source of an A.C. Voltage is.
Choose an answer
Motor
Cell
Generator
Thermo couple
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Question # 2
The expression P = VI hold only when current and voltage are.
Choose an answer
In phase
Out of phase
At right angle to each other
At angle of 120
o
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Question # 3
The Basic circuit element in a D.C. circuits which controls the current and voltage is
Choose an answer
Resistor
Inductor
Capisitor
Transistor
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Question # 4
In metal detector, we use.
Choose an answer
L-C circuit
R-L circuit
R-C circuit
RLC series circuit
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Question # 5
Power dissipation is a pure inductive or in a pure capacitance circuit is:
Choose an answer
10
6
0
10
∘
Maximum
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Question # 6
Choke consumes extremely small
Choose an answer
Current
Charge
Power
Potential
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Question # 7
In RLC series circuit at resonance the phase difference between capacitor and inductor reactance is.
Choose an answer
90
o
270
o
0
o
180
o
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Question # 8
An electromagnetic wave goes from air to glass which of the following does not change?
Choose an answer
Radio waves
X-rays
Ultra violet radiation
Ultra sond waves
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Question # 9
In a pure inductive A.C. circuit the current.
Choose an answer
Lags behind voltage by 90
o
Leads the voltage by 90
o
In phase with voltage
Leads the voltage by 270
o
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Question # 10
The reactance is the ratio of
Choose an answer
V
rms
/I
rms
V
rms
x I
rms
I
rms
/V
rms
V
max
x V
rms
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Question # 11
In chopke coil the resistance X
L
an resistance R are:
Choose an answer
X
L
=R
X
L
<<R
X
L
>>R
X
L
=
∞
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Question # 12
High frequency radio wave is called as
Choose an answer
Fluctuate
Carrier wave
Matter wave
Mechanical wave
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Question # 13
The power factor of RL series circuit is.
Choose an answer
0
1
Less then 1
More than one
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Question # 14
In case of capacitor, the unit of reactance is
Choose an answer
Farad
Ohm
Newton
All of these
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Question # 15
The peak value of alternating current is 5
√2
A. The mean square value of current will be:
Choose an answer
5A
2.5A
5
√2A
5
2
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Question # 16
When 10 V are applied to an A.C circuit, the current flowing in it is 100 mA. It impedance is.
Choose an answer
100 Ohm
10 Ohm
1000 Ohm
1 Ohm
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Question # 17
Unit of impedance is:
Choose an answer
Ohm
Ohm
-1
no unit
Ohm m
-1
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Question # 18
An alternating voltage is given by 20 sin 157 t. Th efrequency of alternating voltage is:
Choose an answer
50 Hz
25Hz
100 Hz
75 Hz
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