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Online Tests
Ics Part 2 Physics Chapter 5 Test Online MCQs With Answers
Question # 1
Which consumes small power.
Choose an answer
Inductor
Resistor
Motor
All of these
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Question # 2
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 # 3
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 # 4
If I
o
is the peak value of current, then its root mean square value is given by
Choose an answer
2 I
o
I
o
0.7 I
o
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Question # 5
In RLC circuit the energy is dissipated in
Choose an answer
R only
R and L
R and C
L and C
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Question # 6
The circuit which compares the two voltages is.
Choose an answer
LDR
Sensor
Comparator
Logic gate
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Question # 7
In modulation, low frequency signal is known as
Choose an answer
Carrier wave
fluctuated signal
Modulated carrier signal
Modulation signal
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Question # 8
X
1
is low for low frequency Fy but Xc is.
Choose an answer
Zero
Low
High
Same is H
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Question # 9
X
L
=
Choose an answer
2πfL
1/2πfL
2πfL
fL/2π
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Question # 10
In purely resistive A.C circuit, instantaneous value of voltage and current:
Choose an answer
Current lags behind voltage
Current leads voltage by π/2
Both are in Phase
Voltage leads current by Pase θ=π/2
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Question # 11
High frequency radio wave is called as
Choose an answer
Fluctuate
Carrier wave
Matter wave
Mechanical wave
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Question # 12
The basic circuit element in A.C. circuit which controls current.
Choose an answer
Resistor only
Capacitor only
Inductor only
All of these
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Question # 13
Radio frequency choke is
Choose an answer
Iron cored
Air Cored
Air as well as iron cored
None of these
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Question # 14
when an inductor comes close to a metallic object, its inductance is.
Choose an answer
Decreased
Increased
Becomes half
Becomes 4 times
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Question # 15
The reactance of inductor depends upon
Choose an answer
L
All of the above
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Question # 16
In A.C circuit through a capacitor which one is:
Choose an answer
Current leads voltage by 90
∘
Current lags behind voltage by 90
∘
Both will be in phase
None of above
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Question # 17
If the frequency of A.C. supplied is doubled then the capacitive reactance becomes.
Choose an answer
Half
Two
Four times
One fourth
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Question # 18
The resonance frequency is given by:
Choose an answer
fr = 2π√LC
fr = 1/2πLC
fr = 1/ 2π√LC
f1 = 1/ 2πC√L
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