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Online Tests
Physics Fsc Part 2 Chapter 5 Online Test MCQs With Answers
Question # 1
If V
rms
be the root mean square value of emf then its peak to peak value is given by
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Question # 2
At resonance frequency, the impedance of RLC series circuit is.
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Maximum
Minimum
Zero
Infinite
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Question # 3
The phase angle of a series RLC circult at resonant frequency is
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1/2
sigma
Zero
sigma /4
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Question # 4
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 # 5
At resonance, the behavior of R-L-C series circuit is.
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Resistive
Capacitive
Inductive
Modulative
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Question # 6
The A.M. transmission frequencies range from
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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 # 7
If I
o
is the peak value of current, then its root mean square value is given by
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2 I
o
I
o
0.7 I
o
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Question # 8
Choke consumes extremely small
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Current
Charge
Power
Potential
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Question # 9
In chopke coil the resistance X
L
an resistance R are:
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X
L
=R
X
L
<<R
X
L
>>R
X
L
=
∞
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Question # 10
The device which allows only the flow of D.C. is.
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Capacitors
transformer
Inductor
Generator
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Question # 11
The peak value of alternating current is 5
√2
A. The mean square value of current will be:
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5A
2.5A
5
√2A
5
2
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Question # 12
In RLC circuit the energy is dissipated in
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R only
R and L
R and C
L and C
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Question # 13
The device which allows only the continuous flow of AC through it is.
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Inductor
Battery
Thermistor
Capacitor
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Question # 14
Power dissipated in a pure inductor is.
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Large
Small
Infinite
Zero
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Question # 15
The reactance of inductor depends upon
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L
All of the above
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Question # 16
Power dissipation in A.C circuit is expressed as:
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P =I
rms
x V
rms
Sinθ
IxVCosθ
I
rms
xV
rms
Cosθ
I
rms
x V
rms
Sin2θ
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Question # 17
An inductor of 1 henry inductance has a reactance 500 ohms, then the frequency required is approximately
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50 Hz
100 Hz
80 Hz
120 Hz
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Question # 18
The mean value of A.C. in a cycle is.
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1
0
I2
Nil
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