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Semiconductor Diode MCQs

Semiconductor Diode MCQs

A semiconductor diode is also known as a semiconductor diode or crystal diode. The semiconductor diode is made of a small piece of semiconductor material. One half is doped as p region while another half as n region with a pn junction and depletion region in between. The p region of diode is known as anode which n region is called the cathode. MCQs.net shares the top 10 MCQs on the diode.

A diode has

A diode has:

  1. One pn junction
  2. Two pn junctions
  3. Three pn junctions
  4. None of these

Correct answer: 1. One pn junction

As compared to its AC resistance, the DC resistance of a crystal diode is

As compared to its AC resistance, the DC resistance of a crystal diode is:

  1. Less
  2. More
  3. Identical

Correct answer: 1. Less

Ripple factor of half wave rectifier is given by

Ripple factor of half wave rectifier is given by:

  1. 1
  2. 1.21
  3. 3.42
  4. 0.89

Correct answer: 2. 1.21

The forward resistance of diode is divided into two categories

The forward resistance of diode is divided into two categories:

  1. True
  2. False

Correct answer: 1. True

Explanation: Diode forward resistance is classified into two categories:

  1. DC forward resistance
  2. AC forward resistance

Forward voltage drop across silicon diode is

Forward voltage drop across silicon diode is:

  1. 0.3 V
  2. 0.7 V
  3. 1.4 V
  4. 2.92 V

Correct answer: 2. 0.7 V

A Zener diode is used as

A Zener diode is used as:

  1. A rectifier
  2. A voltage regulator
  3. An amplifier
  4. A multivibrator

Correct answer: 2. A voltage regulator

The number of diodes in bridge type rectifier are

The number of diodes in bridge type rectifier are:

  1. 1
  2. 2
  3. 4
  4. 8

Correct answer: 3. 4

A Zener diode is always connected

A Zener diode is always connected:

  1. Reverse biased
  2. Forward biased
  3. Both of these
  4. None of these

Correct answer: 1. Reverse biased

Transformer is needed for which type of rectifier circuit

Transformer is needed for which type of rectifier circuit:

  1. Center tap circuit
  2. Half-wave rectifier
  3. Bridge type circuit rectifier
  4. None of these

Correct answer: 1. Center tap circuit

If temperature of crystal diode increases, then the leakage current

If temperature of crystal diode increases, then the leakage current

  1. Increases
  2. Decreases
  3. Remains the same
  4. None of these

Correct answer: 1. Increases

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