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MCQ's Test For ECAT Physics Chapter 18 Electronics
Try The MCQ's Test For ECAT Physics Chapter 18 Electronics
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Total Questions15
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Time Allowed20
ECAT Physics Chapter 18 Electronics
00:00
Question # 1
A potential barrier of 0.7V exists across p-n junction made from:
Question # 2
Origin of the electric and the gravitational forces
Question # 3
In an N-type silicon, which of the following statement is true
Question # 4
In the text book, the transistor amplifier circuit is a:
Question # 5
In the forward biases situation, the current flowing across the p-n junction is a few:
Question # 6
.Depletion region contains:
Question # 7
The value of LDR depends upon intensity of:
Question # 8
Most of the electrons in the base of an NPN transistor flow
Question # 9
Silicon is one of the mot commonly used:
Question # 10
Depletion region contains:
Question # 11
In full wave rectification, simultaneous action is that:
Question # 12
Electric lines of force
Question # 13
To turn the transistor OFF, the base current is set:
Question # 14
In reverse-biased p-n junction, the reverse current is due to flow of:
Question # 15
The number of input terminals of an op-amp is:
Top Scorers Of ECAT Physics Chapter 18 Electronics MCQ`s Test
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H Heer 25 - Jan - 2024 00 Min 37 Sec 60/60 -
H HAMZA Shah 21 - Sep - 2021 00 Min 47 Sec 60/60 -
M Muqadas Zahra 14 - Apr - 2022 02 Min 11 Sec 60/60 -
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U Umer Usman 10 - Mar - 2024 01 Min 09 Sec 55/60 -
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S Shaheer Mustafa 08 - Mar - 2024 02 Min 59 Sec 55/60 -
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A Asadullah 13 - Mar - 2023 04 Min 36 Sec 45/60 -
S Shabana Sehbaz 31 - May - 2024 07 Min 11 Sec 45/60
ECAT Physics Chapter 18 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Most of the electrons in the base of an NPN transistor flow |
A. Out of the base lead
B. Into the collector
C. Into the emit
D. Into the base supply
|
| 2 | To designate the voltage as low or 0 by a logic gate, the specified minimum value is: |
A. 0.2 volt
B. 0.8 volt
C. 0 volt
D. 2.0 volt
|
| 3 | All the valence electrons present in a crystal of silicon are bound in their orbits by |
A. Ionic bond
B. covalent bond
C. Molecular bond
D. Both (A) and (B)
|
| 4 | The concept of electric field theory was introduced by |
A. Michael Faraday
B. Newton
C. Dalton
D. Kepler
|
| 5 | In an N-type silicon, which of the following statement is true |
A. Electrons are majority carriers and trivalent atoms are the dopants
B. Electrons are minority carriers and pentavalent atoms are the dopants
C. Holes are minority carriers and pentavalent atoms are the dopants
D. Holes are majority carriers and trivalent atoms are the dopants
|
| 6 | In full wave rectification, simultaneous action is that: |
A. Two diodes conduct and two do not.
B. One diode conduct and three do not.
C. Three diodes conduct and one does not.
D. All the four diodes conduct
|
| 7 | .Depletion region contains: |
A. Protons
B. Positive ions
C. Negative ions
D. Both (B) and (C)
|
| 8 | Michael Faraday is known by his work on |
A. Nuclear strong force
B. Gravitational force
C. Nuclear weak force
D. Electric force
|
| 9 | Electric lines of force |
A. Intersect each other
B. Are always parallel
C. Are always anti-parallel
D. Never intersect
|
| 10 | An LED emits light when it is: |
A. Forward biased
B. Reverse biased
C. Operated without battery
D. Operated with heat source
|
Test Questions
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