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NEET UG Semiconductor Electronics — practice questions — page 3

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 61–90 of 169.

Doping with a trivalent atom gives which type?Read the answer and worked solution →A pentavalent impurity is known as a:Read the answer and worked solution →A trivalent impurity is known as an:Read the answer and worked solution →In an n-type semiconductor, the majority carriers are:Read the answer and worked solution →In a p-type semiconductor, the majority carriers are:Read the answer and worked solution →One acceptor atom gives how many holes?Read the answer and worked solution →Conductivity of an intrinsic semiconductor depends on its:Read the answer and worked solution →A material with a band gap above three electron volts is an:Read the answer and worked solution →A material with a band gap below three electron volts is a:Read the answer and worked solution →A material behaves as a metal when the two bands:Read the answer and worked solution →In an n-type semiconductor, the minority 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 →Match the semiconductor termRead the answer and worked solution →n-type or p-type?Read the answer and worked solution →Sort by band gapRead the answer and worked solution →True or false about semiconductorsRead the answer and worked solution →Complete the doping ruleRead the answer and worked solution →Name the semiconductor ideaRead the answer and worked solution →Spot the odd one outRead the answer and worked solution →Semiconductor bingoRead the answer and worked solution →The two elemental semiconductors studied here are germanium and:Read the answer and worked solution →In an isolated atom, an electron's energy is fixed by its:Read the answer and worked solution →Inside a crystal, no two electrons see the same pattern of:Read the answer and worked solution →Closely spaced energy levels in a solid form what are called:Read the answer and worked solution →Which band contains the energy levels of valence electrons:Read the answer and worked solution →The band lying above the valence band is called the:Read the answer and worked solution →With no external energy supplied, the valence electrons all sit in the:Read the answer and worked solution →In the absence of excitation, the conduction band is normally:Read the answer and worked solution →When the conduction band overlaps the valence band, the material is a:Read the answer and worked solution →

Worked practice questions

Doping with a trivalent atom gives which type?

  1. An n-type
  2. An intrinsic
  3. A conductor
  4. A p-type
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Correct answer: D. A p-type

1. A trivalent atom has one electron too few for the bonds. 2. That leaves a vacancy, which acts as a hole. 3. Positive carriers dominate, giving p-type material. 4. So the answer is a p-type. _Source: syllabus Physics, Ch 14 'Semiconductor Electronics'_

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A pentavalent impurity is known as a:

  1. Donor
  2. Carrier
  3. Barrier
  4. Blocker
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Correct answer: A. Donor

1. It contributes one extra electron to the crystal. 2. That electron is available for conduction. 3. So the pentavalent impurity is a donor. 4. The answer is donor. _Source: syllabus Physics, Ch 14 'Semiconductor Electronics'_

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A trivalent impurity is known as an:

  1. Oscillator
  2. Acceptor
  3. Amplifier
  4. Insulator
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Correct answer: B. Acceptor

1. It leaves a bond short of one electron. 2. That vacancy can accept an electron from a neighbour. 3. So the trivalent impurity is an acceptor. 4. The answer is acceptor. _Source: syllabus Physics, Ch 14 'Semiconductor Electronics'_

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