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JEE Main Semiconductors: related Physics practice

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Physics questions and exercises with answers

Showing questions 1–21 of 21.

The energy band containing the energy levels of the valence electrons is called the:Read the answer and worked solution →The energy band lying above the valence band is called the:Read the answer and worked solution →Doping silicon or germanium with a pentavalent element produces which semiconductor?Read the answer and worked solution →Doping silicon or germanium with a trivalent impurity produces which semiconductor?Read the answer and worked solution →A pentavalent dopant donates one extra electron and is therefore known as a:Read the answer and worked solution →In a p-type semiconductor, which carriers are the majority carriers?Read the answer and worked solution →In an intrinsic semiconductor, how do the electron and hole concentrations compare?Read the answer and worked solution →For insulators, the energy gap is stated as being greater than:Read the answer and worked solution →For metals, the energy gap is described as being approximately:Read the answer and worked solution →The region on either side of a p-n junction emptied of free charges is called the:Read the answer and worked solution →The potential that prevents electrons moving from the n region into the p region is called the:Read the answer and worked solution →When a diode has its p-side connected to the positive battery terminal, it is said to be:Read the answer and worked solution →When the n-side of a diode is positive and the p-side negative, the diode is:Read the answer and worked solution →The property of a diode that lets it convert alternating voltage is used in a circuit called a:Read the answer and worked solution →The energy gap of silicon is given as approximately:Read the answer and worked solution →The energy gap of germanium is given as approximately:Read 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

The energy band containing the energy levels of the valence electrons is called the:

  1. Valence band
  2. Valiant band
  3. Variance band
  4. Vagrant band
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Correct answer: A. Valence band

1. Electron energies in a crystal group into bands. 2. The outer electrons of the atoms occupy one of them. 3. The energy band which includes the energy levels of the valence electrons is called the valence band. 4. So the answer is the valence band. _Source: syllabus Physics Part II, Ch 14 'Semiconductor Electronics'_

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The energy band lying above the valence band is called the:

  1. Constrained band
  2. Conduction band
  3. Conductive band
  4. Constructed band
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Correct answer: B. Conduction band

1. Two bands matter for conduction in a solid. 2. The upper one is where electrons are free to move. 3. The energy band above the valence band is called the conduction band. 4. So the answer is the conduction band. _Source: syllabus Physics Part II, Ch 14 'Semiconductor Electronics'_

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Doping silicon or germanium with a pentavalent element produces which semiconductor?

  1. An r-type
  2. An s-type
  3. An n-type
  4. An m-type
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Correct answer: C. An n-type

1. A pentavalent atom has one more valence electron than silicon. 2. That spare electron is free to conduct. 3. Doping Si or Ge with a pentavalent element gives an n-type semiconductor. 4. So the answer is n-type. _Source: syllabus Physics Part II, Ch 14 'Semiconductor Electronics'_

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More Physics topics

Electric Charges and FieldsMechanical Properties of Solids and FluidsSemiconductor ElectronicsWave OpticsCurrent ElectricityUnit 2A: Newton's Laws and Translational EquilibriumMoving Charges and MagnetismAtoms and Nuclei