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Online Tests
Ics Part 2 Physics Chapter 5 Test Online MCQs With Answers
Question # 1
At high frequency, the current through a capacitor is
Choose an answer
Small
Infinity
Zero
Large
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Question # 2
In RLC series circuit at resonance the phase difference between capacitor and inductor reactance is.
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90
o
270
o
0
o
180
o
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Question # 3
In the capacitive circuit of A.C. quantity when q= 0 the slope of q-t curve is.
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Maximum
Minimum
Zero
Negative
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Question # 4
In three phase A.C. generator the phase difference between each pair of coil is.
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45
o
90
o
120
o
60
o
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Question # 5
An A.C. voltmeter reads 220 V, its peak value will be
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225 V
240 V
311.12 V
300 V
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Question # 6
An electromagnetic wave goes from air to glass which of the following does not change?
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Radio waves
X-rays
Ultra violet radiation
Ultra sond waves
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Question # 7
The flow of D.C current is opposed by
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Resistor
Induction
Capacitor
All of these
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Question # 8
An alternating quantity (voltage or current) is completely known if we know its:
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Maximum
Frequency and phase
Effective value
Both (a) & (b)
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Question # 9
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 # 10
Resistance of choke is
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zero
Large
Very small
Infinite
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Question # 11
The slope of q-t curve at any instant of time gives.
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Voltage
Current
Charge
Botha a and b
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Question # 12
In AC system we generate sine wave form because:
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It san be easily draw
It produces least disturbance in electrical circuits
It is nature standard
Other waves cannot be produced easily
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Question # 13
The Basic circuit element in a D.C. circuits which controls the current and voltage is
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Resistor
Inductor
Capisitor
Transistor
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Question # 14
At high frequency the value of reactance of capacitor will be.
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Small
Zero
Large
Infinite
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Question # 15
The unit of impedance is.
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Henry
Hertz
Ampere
Ohm
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Question # 16
The natural frequency of L.C circuit is equal to
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Question # 17
The internal resistance of a capacitor is called:
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Impedance
Resistance
Reactance
Conductance
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Question # 18
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 # 19
A capacitor is perfectly insulator for:
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Direct current
Alternating current
Direct as well as alternating current
None of these
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Question # 20
The reactance is the ratio of
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V
rms
/I
rms
V
rms
x I
rms
I
rms
/V
rms
V
max
x V
rms
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Question # 21
Choke consumes extremely small
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Current
Charge
Power
Potential
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Question # 22
Main reason for world wide use of A.C. is
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It is cheaper
Transmitted
Botha a and b
Reaches in short time
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