Basic Electronics MCQ Questions and Answers
Basic Electronics MCQ questions with answers cover fundamental topics like resistors, capacitors, diodes, and transistors. These aptitude questions and answers with explanations are highly useful for competitive exams such as GATE, DRDO, and ISRO. Students can practice aptitude test questions to build their understanding of basic electrical laws and circuit behavior. The aptitude questions with solutions PDF helps learners revise important formulas and key concepts effectively. Whether you’re preparing for electronics-based job placements or national-level exams, mastering these questions is essential for scoring high and clearing technical assessments confidently.
Basic Electronics MCQ
Showing 10 of
29 questions
11. A piece of copper and other of germanium are cooled from the room temperature to 80K, then
- resistance of each will increase
- resistance of copper will decrease
- the resistance of copper will increase while that of germanium will decrease
- the resistance of copper will decrease while that of germanium will increase
12. Diamond is very hard because ?
- it is covalent solid
- it has large cohesive energy
- high melting point
- insoluble in all solvents
13. The part of the transistor which is heavily doped to produce large number of majority carriers is
- emitter
- base
- collector
- any of the above depending upon the nature of transistor
14. An Oscillator is nothing but an amplifier with
- positive, feedback
- negative feedback
- large gain
- no feedback
15. When a P-N junction diode is reverse biased the flow of current across the junction is mainly due to
- diffusion of charge
- drift charges
- depends on the nature o material
- both drift and diffusion of charges
16. Which of the following, when added as an impurity, into the silicon, produces n-type semi conductor
- Phosphorous
- Aluminium
- Magnesium
- both ‘b’ and ‘c’
17. The current gain for a transistor working as common-base amplifier is 0.96. If the emitter current is 7.2 mA, then the base current is
- 0.29mA
- 0.35mA
- 0.39 mA
- 0.43 mA
18. When a n-p-n transistor is used as an amplifier then ?
- the electrons flow from emitter to collector
- the holes flow from emitter to collector
- the electrons flow from collector to emitter
- the electrons flow from battery to emitter
19. When arsenic is added as an impurity to silicon, the resulting material is?
- n-type semiconductor
- p-type semiconductor
- n-type conductor
- Insulator
20. To obtain a p-type germanium semiconductor,it must be doped with ?
- arsenic
- antimony
- indium
- phosphorus