Start learning →

MHT-CET Semiconductors — practice questions — page 2

Explore 49 free Semiconductors questions in MHT-CET Physics. Open each question or exercise to read its content, reference answers and available explanation.

Practise Semiconductors with Quill →

Semiconductors questions and exercises with answers

Showing questions 31–49 of 49.

In an obsolete thermionic diode, electrons flow in only one direction. Which?Read the answer and worked solution →Which diodes are used to regulate voltage once reverse breakdown is reached?Read the answer and worked solution →A Schottky diode is formed from which kind of junction?Read the answer and worked solution →Compared with a p–n junction diode, a Schottky diode has what forward voltage drop?Read the answer and worked solution →Which kind of semiconductor lets an LED emit photons on recombination?Read the answer and worked solution →A laser diode is an LED-like structure placed inside what?Read the answer and worked solution →Which diode is intended to sense light and is packaged to let light pass?Read the answer and worked solution →Varicap diodes are used as what kind of component?Read the answer and worked solution →In forward bias, how does the diode current vary with voltage?Read the answer and worked solution →Under reverse bias, the depletion zone acts as what?Read the answer and worked solution →Which property of a forward-biased diode lets it work as a temperature sensor?Read the answer and worked solution →Zener diodes can be used as what, owing to a precisely defined breakdown voltage?Read the answer and worked solution →What happens to a diode's resistance at its breakdown voltage in reverse?Read the answer and worked solution →What forms near the boundary when p-type and n-type crystals are joined?Read the answer and worked solution →For forward bias, how is a p–n junction diode connected to the supply?Read the answer and worked solution →What happens to the depletion region width when the junction is reverse-biased?Read the answer and worked solution →Who elucidated the modern theory of p–n junctions in his work on electrons and holes?Read the answer and worked solution →Solar cells and LEDs are essentially what kind of device?Read the answer and worked solution →A p–n junction by itself, placed in a circuit, forms which device?Read the answer and worked solution →

Worked practice questions

In an obsolete thermionic diode, electrons flow in only one direction. Which?

  1. From plate to cathode
  2. From cathode to plate
  3. In both ways equally
  4. From plate to the glass
Show answer and solution

Correct answer: B. From cathode to plate

The heated cathode emits electrons that are collected by the plate, so flow is cathode to plate.

Open this question →

Which diodes are used to regulate voltage once reverse breakdown is reached?

  1. Zener diodes
  2. Photodiodes
  3. Schottky diodes
  4. PIN diodes
Show answer and solution

Correct answer: A. Zener diodes

A Zener diode conducts in reverse at a set voltage, which holds the voltage steady across it.

Open this question →

A Schottky diode is formed from which kind of junction?

  1. A p–n junction
  2. Metal–semiconductor
  3. An n–n junction
  4. Glass–metal junction
Show answer and solution

Correct answer: B. Metal–semiconductor

A Schottky diode replaces one semiconductor side with a metal, giving lower capacitance and faster switching.

Open this question →

How to practise

  1. Choose a Semiconductors question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

More Physics topics

ElectrostaticsCurrent ElectricityOscillationsElectromagnetic InductionKinetic Theory of GasesMechanical Properties of FluidsAtomsWave Optics