Test Your Knowledge About Electronics Device

10 Questions | By Blogblog1968 | Last updated: Mar 21, 2022 | Total Attempts: 1520

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Let us help each other, fellow ECE reviewees and students. Do not result to such lowly behavior. As they say, a rising tide floats all boats. Lets mind our manners. Respect, engineers. Good for testing your knowledge and mastery on different review materials. Question bank inlcudes Malvino

Questions and Answers

1.

An ideal voltage source has
- A.
  
  Zero internal resistance
- B.
  
  Infinite internal resistance
- C.
  
  A load-dependent voltage
- D.
  
  A load-dependent current
2.

A real voltage source has
- A.
  
  Zero internal resistance
- B.
  
  Infinite internal resistance
- C.
  
  A small internal resistance
- D.
  
  A large internal resistance
3.

The net charge of a neutral copper atom is
- A.
  
  0
- B.
  
  +1
- C.
  
  - 1
- D.
  
  +4
4.

At room temperature an intrinsic silicon crystal acts approximately like
- A.
  
  Battery
- B.
  
  Conductor
- C.
  
  Insulator
- D.
  
  Piece of copper wire
5.

What causes the depletion layer?
- A.
  
  Doping
- B.
  
  Recombination
- C.
  
  Barrier Potential
- D.
  
  Ions
6.

With a half-wave rectified voltage across the load resistor, load current flows for what part of a cycle?
- A.
  
  0 degrees
- B.
  
  90 degrees
- C.
  
  180 degrees
- D.
  
  360 degrees
7.

The load voltage is approximately constant when a zener diode is
- A.
  
  Forward-biased
- B.
  
  Reverse-biased
- C.
  
  Operating in the breakdown region
- D.
  
  Unbiased
8.

For typical operation, you need to use reverse bias with a
- A.
  
  Zener diode
- B.
  
  Photodiode
- C.
  
  Varactor
- D.
  
  All of the above
9.

. If the depletion layer gets wider, the capacitance
- A.
  
  Decreases
- B.
  
  Stays the same
- C.
  
  Increases
- D.
  
  Is variable
10.

The currents of a pnp transistor are
- A.
  
  Usually smaller than npn currents
- B.
  
  Opposite npn currents
- C.
  
  Usually larger than npn currents
- D.
  
  Negative