Electrical Engineering MCQs MCQs
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For either germanium or silicon diodes, the barrier potential decreases _______ for each Celsius degree rise.
- A. 1 mV
- B. 3 mV
- C. 4 mV
- D. 2 mV
- Correct Answer: Option D
K shell means
- A. First orbit
- B. 2nd orbit
- C. 3rd orbit
- D. 4th orbit
- Correct Answer: Option A
Valence orbit is the other form for
- A. Outer orbit
- B. 3rd orbit
- C. 4th orbit
- D. 2nd orbit
- Correct Answer: Option A
A semiconductor in its purest form is called
- A. Pure semiconductor
- B. Doped semiconductor
- C. Intrinsic semiconductor
- D. Extrinsic semiconductor
- Correct Answer: Option C
A transistor configuration with the lowest current gain.
- A. Common emitter
- B. Common base
- C. Common collector
- D. Emitter-follower
- Correct Answer: Option B
The electrons in the largest orbit travel ________ than the electrons in the smaller orbits.
- A. More slowly
- B. Faster
- C. In the same velocity
- D. A little bit slower
- Correct Answer: Option A
The reason why electrons are not pulled into the nucleus of an atom.
- A. Because of the centrifugal or outward force created by their orbital motion.
- B. Because of the force of attraction between them and the nucleus is weak.
- C. Because they are not being attracted by the positive nucleus.
- D. Because of the strong bonding between them that resists any force pulling them towards the nucleus.
- Correct Answer: Option A
Varactor diodes are commonly used
- A. As voltage controlled capacitance
- B. As a constant current source
- C. As voltage multiplier
- D. As a constant voltage source
- Correct Answer: Option A
The maximum permissible number of electrons in the third orbit is
- A. 18
- B. 8
- C. 32
- D. 2
- Correct Answer: Option A
How many electrons are there in the fourth orbit of a copper atom?
- A. 1
- B. 2
- C. 3
- D. 4
- Correct Answer: Option A