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Online Tests
Physics Fsc Part 2 Chapter 5 Online Test MCQs With Answers
Question # 1
The A.M. transmission frequencies range from
Choose an answer
540 KHz to 1000 KHz
540 Khz to 1600 KHz
520 KHz TO 1600 KHz
520 KHz TO 1400 KHz
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Question # 2
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 # 3
Xc =
Choose an answer
1/2πfc
2πfc
2π/fc
fc/2π
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Question # 4
In pure capacitor A.C. circuit, the current I and charge q are.
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In phase
Out of phase
Parallel to each other
None of above
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Question # 5
The electromagnetic spectrum contains
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Radio waves
X-rays
Microwaves
All of these
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Question # 6
Impedance is denoted by:
Choose an answer
A
Z
P
Q
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Question # 7
The velocity of an oscillating charge as it moves to and fro along a wire is.
Choose an answer
Changing
Constant
Infinite
zero
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Question # 8
X
L
=
Choose an answer
2πfL
1/2πfL
2πfL
fL/2π
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Question # 9
An alternating quantity (voltage or current) is completely known if we know its:
Choose an answer
Maximum
Frequency and phase
Effective value
Both (a) & (b)
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Question # 10
The highest value reached by the voltage or current in one cycle is called.
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Peak ot peak value
Peak value
Instantaneous value
Root mean square value
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Question # 11
In A.C circuit of inductor which one is true
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Voltage leads current by phase angle π/2
Voltage lags current by π/2
Current leads voltage by π/2
Both remain in phase
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Question # 12
The main use of A.C is
Choose an answer
Minimum line losses
Long distance transmission
Stepping up to required voltage only
Steeping down to required voltage only
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Question # 13
In metal detector, we use.
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L-C circuit
R-L circuit
R-C circuit
RLC series circuit
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Question # 14
In three phase A.C supply coils are inclined at an angle of.
Choose an answer
0
o
90
o
120
o
80
o
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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
In case of A.C. through resistor V and I are
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At 0
o
with each other
At 180
o
with each other
At 90
o
with each other
At 270
o
with each other
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Question # 17
In LR circiut which one of the following statements is correct?
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L and R opposes each other
R value increases with frequency
The inductive reactance increases with frequency
The inductive reactance decreases with frequency
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Question # 18
Electron vibrating 94,000 times each second will produce radio waves of frequency.
Choose an answer
94 Hz
940 HZ
94 Hz
490 Hz
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