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ISC Class 12 Semiconductor Electronics — practice questions

Explore 58 free Semiconductor Electronics questions in ISC Class 12 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 1–30 of 58.

Assertion and reasonRead the answer and worked solution →True or false: carriers in a semiconductorRead the answer and worked solution →n-type or p-type?Read the answer and worked solution →Match the semiconductor termRead the answer and worked solution →NEET · Physics · N-type or P-typeRead the answer and worked solution →True or false about semiconductorsRead the answer and worked solution →Name the semiconductor ideaRead the answer and worked solution →A material with a band gap below three electron volts is a:Read the answer and worked solution →The energy separation between the two bands is called the:Read the answer and worked solution →Doping with a trivalent atom gives which type?Read the answer and worked solution →A trivalent impurity is known as an:Read the answer and worked solution →The band just above the valence band is the:Read the answer and worked solution →The output of an AND gate is HIGH only when:Read the answer and worked solution →Tap every semiconductor the chapter namesRead the answer and worked solution →One acceptor atom gives how many holes?Read the answer and worked solution →Deliberate addition of an impurity to a semiconductor is called:Read the answer and worked solution →A doped semiconductor is described as:Read the answer and worked solution →Sort by band gapRead the answer and worked solution →In an intrinsic semiconductor, electrons and holes are:Read the answer and worked solution →Doping with a pentavalent atom gives which type?Read the answer and worked solution →A pentavalent impurity is known as a:Read the answer and worked solution →In an n-type semiconductor, the majority carriers are:Read the answer and worked solution →A junction diode is described as a device with how many electrodes?Read the answer and worked solution →Holes exist as vacant levels created in the:Read the answer and worked solution →Order the reasoning: why a pure semiconductor conductsRead the answer and worked solution →Resistivity rangesRead the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →The barrier (built-in) potential of an unbiased silicon p-n junction at room temperature is approximatelyRead the answer and worked solution →Metal, semiconductor, or insulator?Read the answer and worked solution →True or false: intrinsic semiconductorsRead the answer and worked solution →

Worked practice questions

Assertion and reason

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Questions
  1. Reason
    Thermal excitation produces electrons and holes as an intrinsic property.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    A pure semiconductor conducts a little even with no impurity added.
  2. Reason
    Metals, semiconductors and insulators occupy separate resistivity ranges.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    Resistivity alone can classify a material.
  3. Reason
    Semiconductors have intermediate resistivity.
    Verdict
    The assertion is false and the reason is true.
    Assertion
    Copper is a semiconductor.
The reason must genuinely explain the assertion. Source: syllabus Physics, Ch 14 Semiconductor Electronics.

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True or false: carriers in a semiconductor

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Questions
  1. Statement is true
    Yes
    Statement
    Both electrons and holes act as charge carriers.
  2. Statement is true
    Yes
    Statement
    A hole is left behind when an electron is freed.
  3. Statement is true
    No
    Statement
    Only electrons carry charge in a semiconductor.
  4. Statement is true
    Yes
    Statement
    Thermal excitation frees the carriers in an intrinsic semiconductor.
  5. Statement is true
    Yes
    Statement
    An intrinsic semiconductor is a pure one.
Electrons and holes both carry charge. Source: syllabus Physics, Ch 14 Semiconductor Electronics.

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n-type or p-type?

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Left
n-type
Items
  1. Item
    Pentavalent dope
    Answer
    n-type
  2. Item
    Donor impurity
    Answer
    n-type
  3. Item
    Electrons rule
    Answer
    n-type
  4. Item
    Trivalent dope
    Answer
    p-type
  5. Item
    Acceptor impurity
    Answer
    p-type
  6. Item
    Holes rule
    Answer
    p-type
Right
p-type
Instructions
Swipe left for n-type, right for p-type.
_Source: syllabus Physics, Ch 14 'Semiconductor Electronics'_

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