Five marks questions from Electronic Devices (Long Answer Type)

  1. Explain the formation of energy Bands in solids. Distinguish between metals, insulators and semiconductors on the basis of band theory.
  2. Distinguish between intrinsic and extrinsic semiconductors and the conduction in P type and N type semiconductors.
  3. Explain the formation of depletion region and barrier potential in a pn junction.
  4. Draw the circuit diagram used to study the Forward and reverse bias characteristics and draw the graph for forward bias and reverse bias.
  5. Describe the working of a half wave rectifier  with the help of a neat labeled diagram and draw the input and output wave forms.
  6. Describe the working of a full wave rectifier with the help of a neat labelled diagram and draw the input and output wave forms.
  7. Draw the symbols of npn and pnp transistor. Show the biasing of a transistor and explain transistor action. 
  8. Describe the working of an npn transistor in CE configuration as an amplifier.
  9. Explain the working of a transistor in CE configuration as oscillator.
  10. Explain the action of transistor as a switch.

(Have some more idea? Post them as comments)

Must Practice Questions for CBSE Physics CLASS 12: Solved

We will publish here the portions one cannot afford to miss while preparing for the CBSE class 12  Physics Examination

The Chapters will be posted below. On Clicking the name of the chapter a new page will open. On that page there will be a set of collected questions. On clicking the questions, the complete solution to the questions will open.

Please note that this system is under preparation. We hope to complete this within a month. The link will be activated only after completing the project.

  1. ELECTROSTATICS
  2. CURRENT ELECTRICITY
  3. MAGNETIC EFFECTS OF CURRENT
  4. ELECTROMAGNETIC INDUCTION
  5. ALTERNATING CURRENT
  6. ELECTROMAGNETIC WAVES
  7. OPTICS
  8. DUAL NATURE OF MATTER AND RADIATION
  9. ATOMS AND NUCLEI
  10. ELECTRONIC DEVICES
  11. COMMUNICATION SYSTEMS