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Online Tests
MDCAT Physics Chapter 10 Electronics Online Test MCQs With Answers
Question # 1
For full wave rectification, the minimum number of diodes used is:
Choose an answer
1
2
3
4
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Question # 2
When two semiconductors of p- and n-type are brought into contact, they from a p-n junction which act like a:
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Conductor
Amplifier
Oscillator
Rectifier
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Question # 3
Inverting amplifier circuits have
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A very high input impendance
A very low input impendance
A low output impendance
Both A and C
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Question # 4
A PN junction diode cannot be use:
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As rectifier
For converting light energy to electrical energy
For getting light radiation
For increasing the amplitude of an ac signal
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Question # 5
The method by which only one half of A.C cycle is converted into direct current is called
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half wave amplification
half wave rectification
Full wave rectification
full wave amplification
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Question # 6
The power output of a full wave rectifier is:
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Equal to H.W.R
Twice of H.W.R
Half of H.W.R
Four times of H.W.R
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Question # 7
The unit of gain (G) for non-inverting amplifier is
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Ampere
ohm
Volt
None of these
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Question # 8
For a normal AC cycle, during T/2 to T the diode act as:
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Open switch
full wave rectifier
Close switch
All are correct
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Question # 9
A pulsating DC can be converted into constant voltage by using
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Filter
Full wave rectifier
Half wave rectifie
Bridge rectifier
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Question # 10
A pure semiconductor has:
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An infinite resistance at 0
o
C)
A finite resistance which does not depend upon temperature
A finite resistance which decreases with temperature
A finite resistance which increase with temperature
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Question # 11
In a full wave rectifier, the diode conducts during
Choose an answer
Both halves of the input cycle
A portion of the positive half cycle of the input
Positive half cycle of the input
Positive half cycle of the input
Both halves of the input cycle
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Question # 12
A non-conducting semiconductor diode is:
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Forward biased
Poorly biased
Reverse biased
None of them
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Question # 13
The simplest type of rectification known as half wave rectification is obtained by
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Using a transistor
Suppressing the harmonics in A.C. voltage
Suppressing half wave of A.C. supply by using diode
Using a Coolidge
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Question # 14
Gain of operational amplifier is independent of;
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Internal structure
External Structure
Batteries
Potential changes
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Question # 15
A device which convert DC into AC is calleD)
Choose an answer
Invertor
Generator
Rectifier
Motor
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