Chapter 18 Electronics Physics 12th Class Punjab MCQ Tests
12th Class Physics Chapter 18 MCQ Tests
Chapter 18 of 12th Class Physics has 40 questions. If you take an online MCQ test, the system will randomly choose the questions. If you want to take the quiz by chapter then click the start test button.
Total Questions: 40
Total Marks: 40
Time: 40 Mins
Total Questions: 40
Total Marks: 40
Time: 40 Mins
40Min : 00 Sec Remaining
Question # 1
The op-amp can amplify which type of signals?
Question # 2
Why is base of transistor made so thin and very lightly doped?
Question # 3
Which of the following statements is true in case of full wave rectification?
Question # 4
NAND gate is used to invert the output of which of the following?
Question # 5
How many inputs are there in an operational amplifier?
Question # 6
During rectification process, which current is received across the load resistance 'R'?
Question # 7
The output of a two-inputs NOR gate is 1 for which of the following conditions?
Question # 8
The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than 2480 nm is incident on it. What is the band gap (in eV) of the semiconductor?
Question # 9
In a full wave rectifier, the current in each of the diodes flows for how much part of the signal?
Question # 10
Which of the following amplifiers is called the current amplifier?
Question # 11
In which of the following gates, the output is zero only when the inputs are different?
Question # 12
For the normal operation of transistor, what type of biasing should be present in emitter-base junction?
Question # 13
Solve:
Question # 14
Which of the following gates is also known as an invertor?
Question # 15
When the p-n junction is forward biased, current flows through the junction due to which of the following carriers?
Question # 16
What is the input resistance of op-amp?
Question # 17
The gain G of op-amp depends on which of the following factors?
Question # 18
If a signal passing through a gate is inhibited by sending a LOW into one of the inputs, and the output is HIGH, then which one of the following is the gate been used?
Question # 19
Which of the following is true in case of an unbiased p-n junction diode?
Question # 20
Which of the following amplifiers gives a phase shift of 180° between input and output signal?
Question # 21
Why is the base of transistor made so thin and very lightly doped?
Question # 22
Photovoltaic cells are also termed as which of the following?
Question # 23
Which of the following is a forward biased diode?
Question # 24
In photovoltaic cell, the current is directly proportional to which of the following quantities?
Question # 25
Which of the following are charge carriers in a p-type substance?
Question # 26
In half-wave rectification, what is the state of diode during the negative cycle of wave?
Question # 27
The output of an AND gate with three inputs A, B and C is high for which of the following states of inputs?
Question # 28
In half wave rectification, diode conducts during which cycle?
Question # 29
Which of the following represents the total emitter current?
Question # 30
If I C / I E = 0.96 for a transistor, then what is the current gain in the common-emitter configuration?
Question # 31
NOR gate is used to invert the output of which of the following?
Question # 32
Which of the following states is true for OR gate, if S1 and S2 represent two switches?
Question # 33
Which of the following operations is occurring when A = 1, B = 0, and X = 1?
Question # 34
Which of the following is the least doped region in a transistor?
Question # 35
The inputs of a gate are 1 and 0. Identify the gate from the following, if the output is 0.
Question # 36
In NPN transistor, the current flows in which direction?
Question # 37
Which of the following is based on forward biased p-n junction?
Question # 38
A p-type semiconductor has acceptor level 57 meV above the valence band. What is the maximum wavelength of light required to create a hole?
Question # 39
The gain 'G' of op-amp depends on which of the following factors?
Question # 40
In p-n junction, if p-side is at negative potential and n-side is at positive potential, then what type of junction is it?
Total Questions
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Question # 1
The op-amp can amplify which type of signals?
Question # 2
Why is base of transistor made so thin and very lightly doped?
Question # 3
Which of the following statements is true in case of full wave rectification?
Question # 4
NAND gate is used to invert the output of which of the following?
Question # 5
How many inputs are there in an operational amplifier?
Question # 6
During rectification process, which current is received across the load resistance 'R'?
Question # 7
The output of a two-inputs NOR gate is 1 for which of the following conditions?
Question # 8
The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than 2480 nm is incident on it. What is the band gap (in eV) of the semiconductor?
Question # 9
In a full wave rectifier, the current in each of the diodes flows for how much part of the signal?
Question # 10
Which of the following amplifiers is called the current amplifier?
Question # 11
In which of the following gates, the output is zero only when the inputs are different?
Question # 12
For the normal operation of transistor, what type of biasing should be present in emitter-base junction?
Question # 13
Solve:
Question # 14
Which of the following gates is also known as an invertor?
Question # 15
When the p-n junction is forward biased, current flows through the junction due to which of the following carriers?
Question # 16
What is the input resistance of op-amp?
Question # 17
The gain G of op-amp depends on which of the following factors?
Question # 18
If a signal passing through a gate is inhibited by sending a LOW into one of the inputs, and the output is HIGH, then which one of the following is the gate been used?
Question # 19
Which of the following is true in case of an unbiased p-n junction diode?
Question # 20
Which of the following amplifiers gives a phase shift of 180° between input and output signal?
Question # 21
Why is the base of transistor made so thin and very lightly doped?
Question # 22
Photovoltaic cells are also termed as which of the following?
Question # 23
Which of the following is a forward biased diode?
Question # 24
In photovoltaic cell, the current is directly proportional to which of the following quantities?
Question # 25
Which of the following are charge carriers in a p-type substance?
Question # 26
In half-wave rectification, what is the state of diode during the negative cycle of wave?
Question # 27
The output of an AND gate with three inputs A, B and C is high for which of the following states of inputs?
Question # 28
In half wave rectification, diode conducts during which cycle?
Question # 29
Which of the following represents the total emitter current?
Question # 30
If I C / I E = 0.96 for a transistor, then what is the current gain in the common-emitter configuration?
Question # 31
NOR gate is used to invert the output of which of the following?
Question # 32
Which of the following states is true for OR gate, if S1 and S2 represent two switches?
Question # 33
Which of the following operations is occurring when A = 1, B = 0, and X = 1?
Question # 34
Which of the following is the least doped region in a transistor?
Question # 35
The inputs of a gate are 1 and 0. Identify the gate from the following, if the output is 0.
Question # 36
In NPN transistor, the current flows in which direction?
Question # 37
Which of the following is based on forward biased p-n junction?
Question # 38
A p-type semiconductor has acceptor level 57 meV above the valence band. What is the maximum wavelength of light required to create a hole?
Question # 39
The gain 'G' of op-amp depends on which of the following factors?
Question # 40
In p-n junction, if p-side is at negative potential and n-side is at positive potential, then what type of junction is it?
Total Questions
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Physics MCQ Test by Topics
- +18.1 Brief Review of p-n Junction and its Characteristics
- +18.1 Forward Biased p-n Junction
- +18.1 Reverse Biased p-n Junction
- +18.2 Rectification
- +18.2 Half Wave Rectification
- +18.2 Full Wave Rectification
- +18.3 Specially Designed p-n Junction
- +18.3 Light Emitting Diode
- +18.3 Photo Diode
- +18.3 Photo-Voltaic Cell
- +18.4 Transistors
- +18.4 Current Flow in a n-p-n Transistor
- +18.5 Transistor as an Amplifier
- +18.6 Transistor as a Switch
- +18.7 Operational Amplifier
- +18.7 Characteristics of op-amp
- +18.8 OP-AMP as Inverting Amplifier
- +18.9 OP-AMP as Non-Inverting Amplifier
- +18.10 OP-AMP as a Comparator
- +18.11 Comparator as a Night Switch
- +18.12 Digital Systems
- +18.13 Fundamental Logic Gates
- +18.13 OR Gate
- +18.13 AND Gate
- +18.13 NOT Gate
- +18.14 Other Logic Gates
- +18.15 Applications of Gates in Control Systems
Physics
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Updated on: 01-09-2026
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