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Semiconductor Diode MCQ Basic Level

Dear Readers,

Physics is an important subject in preparation for various Competitive exams.To keep a track of your preparation we have designed a small quiz of 10 Basic Level Questions on Semiconductor Diode. You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. The P-N junction diode is used as

  •  An amplifier
  •  An oscillator
  •  A rectifier
  •   A modulator

A rectifier

Q2. When P-N junction diode is forward biased, then

  •  The depletion region is reduced and barrier height is increased
  •  The depletion region is widened and barrier height is reduced
  •  Both the depletion region and barrier height are increased
  •  Both the depletion region and barrier height are increased

Both the depletion region and barrier height are reduced

Q3. A crystal diode is a

  •   Non-linear device
  •   A Amplifying device
  •  An Linear device
  •  Fluctuating device

Non-linear device

Q4. In a P-N junction photo cell, the value of photo-electromotive force produced by monochromatic light is proportional to

  •  The voltage applied at the P-N junction
  •  The barrier voltage at the P-N junction
  •  The intensity of the light falling on the cell
  •  The frequency of the light falling on the cell

intensity of the light falling on the cell

Q5. In the middle of the depletion layer of a reverse-biased P-N junction, the

  •  Potential is zero
  •   Electric field is zero
  •  Potential is maximum
  •  Electric field is maximum

Electric field is maximum

Q6. If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be

  •  50 Hz
  •  70.7 Hz
  •  100 Hz
  •  27 Hz

100 Hz

Q7. Barrier potential of a P-N junction diode does not depend on

  •  Temperature
  •  Forward bias
  •  Doping density
  •  Diode design

Diode design

Q8. The reverse biasing in a P-N junction diode

  •   Decreases the potential barrier
  •  Increases the potential barrier
  •   Increases the number of minority charge carriers
  •  Ethyl Increases the number of majority charge carriers

Increases the potential barrier

Q9. In the depletion region of an unbiased P-N junction diode there are

  •  Only electrons
  •  Only holes
  •  Both electrons and holes
  •  Only fixed ions

Only fixed ions

Q10. The electrical circuit used to get smooth dc output from a rectifier circuit is called

  •  Oscillator
  •  Filter
  •  Amplifier
  •   Logic gates

Filter



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