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OJEE Semiconductor Electronics — practice questions — page 2

Explore 49 free Semiconductor Electronics questions in OJEE Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Semiconductor Electronics questions and exercises with answers

Showing questions 31–49 of 49.

Order the reasoning: why a pure semiconductor conductsRead the answer and worked solution →True or false: classifying materialsRead the answer and worked solution →Resistivity rangesRead the answer and worked solution →True or false: carriers in a semiconductorRead the answer and worked solution →Device or material?Read the answer and worked solution →Tap every factor deciding a material's classRead the answer and worked solution →Assertion and reason: semiconductorsRead the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Two true, one falseRead the answer and worked solution →Spot the odd one outRead the answer and worked solution →Complete the resistivity comparisonRead the answer and worked solution →True or false: devicesRead the answer and worked solution →Pure and impureRead the answer and worked solution →Order the classification of a materialRead the answer and worked solution →n-type against p-typeRead the answer and worked solution →Sort by the band gapRead the answer and worked solution →Intrinsic and extrinsicRead the answer and worked solution →One word is wrongRead the answer and worked solution →Type the band gapsRead the answer and worked solution →

Worked practice questions

Order the reasoning: why a pure semiconductor conducts

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Steps
  1. Start with a pure semiconductor crystal
  2. Thermal energy excites some electrons out of their bonds
  3. Each freed electron leaves a hole behind
  4. Both the electron and the hole can move
  5. So the pure material conducts, and is called intrinsic
Heat supplies the carriers. Source: syllabus Physics, Ch 14 Semiconductor Electronics.

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True or false: classifying materials

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Questions
  1. Statement is true
    Yes
    Statement
    Lattice structure helps decide a material's class.
  2. Statement is true
    Yes
    Statement
    Atomic structure of the constituent elements matters too.
  3. Statement is true
    Yes
    Statement
    Semiconductors sit between metals and insulators in resistivity.
  4. Statement is true
    No
    Statement
    All semiconductors are elemental.
  5. Statement is true
    Yes
    Statement
    Diodes and transistors are built from semiconductors.
Structure and resistivity together. Source: syllabus Physics, Ch 14 Semiconductor Electronics.

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Resistivity ranges

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Questions
  1. Question
    Metals have resistivity in the range
    Choices
    1. above 10⁸ Ω m
    2. 10⁻² to 10⁻⁸ Ω m
    3. exactly 1 Ω m
    Correct choice
    10⁻² to 10⁻⁸ Ω m
  2. Question
    Insulators have resistivity
    Choices
    1. below 10⁻⁸ Ω m
    2. around zero
    3. above 10⁸ Ω m
    Correct choice
    above 10⁸ Ω m
  3. Question
    Semiconductors sit
    Choices
    1. between the two
    2. below metals
    3. above insulators
    Correct choice
    between the two
The three bands the chapter gives. Source: syllabus Physics, Ch 14 Semiconductor Electronics.

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