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Indian Navy AA (Artificer Apprentice) Semiconductor Devices — practice questions

Explore 3 free Semiconductor Devices questions in Indian Navy AA (Artificer Apprentice) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Semiconductor Devices questions and exercises with answers

Showing questions 1–3 of 3.

In an intrinsic (pure) semiconductor at T > 0:Read the answer and worked solution →n-type or p-type?Read the answer and worked solution →True or false: semiconductorsRead the answer and worked solution →

Worked practice questions

In an intrinsic (pure) semiconductor at T > 0:

  1. Only electrons
  2. No charge carriers
  3. Only holes
  4. Equal number of electrons (in CB) and holes (in VB)
Show answer and solution

Correct answer: D. Equal number of electrons (in CB) and holes (in VB)

Thermal excitation promotes electrons from valence band to conduction band, leaving holes. n_e = n_h = n_i (intrinsic carrier concentration). Both contribute to conductivity.

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n-type or p-type?

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Items
  1. Item
    Pentavalent dopant
    Category
    n-type
  2. Item
    Spare electron
    Category
    n-type
  3. Item
    Electrons carry it
    Category
    n-type
  4. Item
    Trivalent dopant
    Category
    p-type
  5. Item
    Leaves a hole
    Category
    p-type
  6. Item
    Holes carry it
    Category
    p-type
Categories
  1. Item
    n-type
  2. Item
    p-type
Instructions
Tap a description, then tap the kind of doped semiconductor it names.
_Source: syllabus Physics Ch14 Semiconductor Electronics, SEMICONDUCTOR ELECTRONICS_

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True or false: semiconductors

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Questions
  1. Statement is true
    Yes
    Statement
    Adding a desirable impurity to a semiconductor is called doping.
  2. Statement is true
    Yes
    Statement
    Silicon is tetravalent, so it has four valence electrons.
  3. Statement is true
    Yes
    Statement
    A junction diode is a two-electrode device.
  4. Statement is true
    No
    Statement
    Doping makes a semiconductor a perfect insulator.
Instructions
Decide whether each statement about semiconductors is true or false.
_Source: syllabus Physics Ch14 Semiconductor Electronics, SEMICONDUCTOR ELECTRONICS_

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