Electrical Engineering MCQs MCQs

Tech Books Yard have 612 Electrical Engineering MCQs for Free Download

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