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Online Tests
Ics Part 2 Physics Chapter 5 Test Online MCQs With Answers
Question # 1
A resistance frequency the impedance of RLC parallel circuit is.
Choose an answer
Zero
Infinite
Maximum
Minimum
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Question # 2
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 # 3
In Pakistan the frequency of A.C. supply is.
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50 Hz
60 Hz
45 Hz
70 Hz
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Question # 4
The peak value of A.C source is 20 A, then its rms value will be.
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14.1 A
10 A
20 A
28.2 A
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Question # 5
The unit of impedance is
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Farad
Henry
Tesla
Ohm
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Question # 6
X
1
is low for low frequency Fy but Xc is.
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Zero
Low
High
Same is H
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Question # 7
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 # 8
The mean value of A.C. in a cycle is.
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1
0
I2
Nil
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Question # 9
When 10 V are applied to an A.C circuit, the current flowing in it is 100 mA. It impedance is.
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100 Ohm
10 Ohm
1000 Ohm
1 Ohm
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Question # 10
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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Question # 11
In A.C circuit through a capacitor which one is:
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Current leads voltage by 90
∘
Current lags behind voltage by 90
∘
Both will be in phase
None of above
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Question # 12
The combined effect of resistance and reactance is knows as.
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Inductance
Conductance
Resistance
Impedance
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Question # 13
The reactance of inductor depends upon
Choose an answer
L
All of the above
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Question # 14
Resistance of choke is
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zero
Large
Very small
Infinite
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Question # 15
The electromagnetic spectrum contains
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Radio waves
X-rays
Microwaves
All of these
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Question # 16
100 micro F capacitor is connects to an AC voltage 24 V and frequency 50 Hz. The reactance of the capacitor is.
Choose an answer
30.8 Ohm
31.8 Ohm
34.8 Ohm
40 Ohm
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Question # 17
The circuit which compares the two voltages is.
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LDR
Sensor
Comparator
Logic gate
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Question # 18
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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