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MDCAT Physics Chapter 10 Electronics Online Test MCQs With Answers
Question # 1
The diode charactristics curve is plot between
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I & t
V& t
V& I
None
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Question # 2
The resistance of operational amplifier between inverting and non-inverting terminal is of the order of:
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Few Ohms
Mega Ohms
Few Kilo Ohms
Micro Ohms
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Question # 3
In a full wave rectifier with input frequency 50Hz. The frequency of pulsating D)C) received as an output across the load is
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50 Hz
100 Hz
500 Hz
zero
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Question # 4
The efficiency of half wave rectifier is:
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25.6%
1.2%
40.6%
66.6%
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Question # 5
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 # 6
For full wave rectification, the minimum number of diodes used is:
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1
2
3
4
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Question # 7
The magnitude of potential barrier for Ge is
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0.7 v
0.3 V
7v
3 v
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Question # 8
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 # 9
A diode as a rectifier converts:
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A)c into D)c
D)c into A)c
Varying D)c current into constant D)c current
High voltage into low voltage and vice-versa
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Question # 10
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 # 11
In a half wave rectifier circuit operating from 50 Hz mains frequency, the fundamental frequency in the ripple would be:
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25 Hz
70.7 Hz
50 Hz
100 Hz
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Question # 12
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 # 13
Gain of operational amplifier is independent of;
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Internal structure
External Structure
Batteries
Potential changes
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Question # 14
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 # 15
A non-conducting semiconductor diode is:
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Forward biased
Poorly biased
Reverse biased
None of them
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