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NEET UG Semiconductor Electronics — practice questions — page 5

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 121–150 of 169.

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 →Elemental or compound semiconductor?Read the answer and worked solution →Semiconductors in devicesRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Flip and pair: material with its classRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Device or material?Read the answer and worked solution →Three of these are wrong. Find the one that holds.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 →

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 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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The band just above the valence band is the:

  1. Depletion layer
  2. Conduction band
  3. Forbidden region
  4. Impurity levels
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Correct answer: B. Conduction band

1. Free electrons need a band they can move in. 2. It lies immediately above the filled band. 3. That is the conduction band. 4. So the answer is conduction band. _Source: syllabus Physics, Ch 14 'Semiconductor Electronics'_

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