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NEET UG Semiconductor Electronics — practice questions — page 4

Explore 169 free Semiconductor Electronics questions in NEET UG 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 91–120 of 169.

If a gap leaves the valence electrons all bound, the material is an:Read the answer and worked solution →At room temperature, the conductivity of an intrinsic semiconductor is:Read the answer and worked solution →The conductivity of a semiconductor is improved by adding:Read the answer and worked solution →The impurity added to a semiconductor is measured in parts per:Read the answer and worked solution →A semiconductor with added impurity is called:Read the answer and worked solution →The deliberate addition of an impurity is called:Read the answer and worked solution →Atoms of the added impurity go by which name:Read the answer and worked solution →A dopant must be chosen so that it does not distort the:Read the answer and worked solution →For a dopant not to distort the lattice, its atoms must be of nearly the same:Read the answer and worked solution →Silicon and germanium are described as elements that are:Read the answer and worked solution →How many types of dopant are used with silicon or germanium?Read the answer and worked solution →Arsenic, antimony and phosphorus are dopants that are:Read the answer and worked solution →Indium, boron and aluminium are dopants that are:Read the answer and worked solution →True or false on semiconductorsRead the answer and worked solution →Quick picks on semiconductorsRead the answer and worked solution →Match each term to its meaningRead the answer and worked solution →Conductor or insulatorRead the answer and worked solution →Pentavalent or trivalentRead the answer and worked solution →Make an extrinsic semiconductorRead the answer and worked solution →Fill the gaps on semiconductorsRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →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 →

Worked practice questions

If a gap leaves the valence electrons all bound, the material is an:

  1. Conductor
  2. Amplifier
  3. Oscillator
  4. Insulator
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Correct answer: D. Insulator

1. No free electrons are available in the conduction band. 2. So no current can be carried. 3. The material is an insulator. _Source: syllabus Physics Part II, Chapter 14, Semiconductor Electronics._

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At room temperature, the conductivity of an intrinsic semiconductor is:

  1. Very low
  2. Very high
  3. Quite fixed
  4. Fully zero
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Correct answer: A. Very low

1. Its conductivity depends on temperature. 2. At ordinary temperatures few electrons are excited. 3. So the conductivity is very low. _Source: syllabus Physics Part II, Chapter 14, Semiconductor Electronics._

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The conductivity of a semiconductor is improved by adding:

  1. Coolants
  2. Impurities
  3. Insulators
  4. Magnets
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Correct answer: B. Impurities

1. A pure semiconductor conducts too poorly to be useful. 2. Something must be added to raise its conductivity. 3. That is a small amount of impurity. _Source: syllabus Physics Part II, Chapter 14, Semiconductor Electronics._

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