Semiconductor Devices Theoretical Important Questions in Physics for Class-XII Pdf Download

Obtain crucial theoretical questions on Semiconductor Devices for Class-12 Physics. Get the PDF download now to enhance your exam preparation and excel in your studies!

Chapter 14 : Semi Conductor And Devices


  • Energy Bands in Conductors, Semiconductor and insulators
  • Semiconductor diode I-V Characteristics in forward and reverse bias, diode as a rectifier.
  • Special purpose p-n junction diode: LED photodiode, solar cell and Zener diode and their Characteristics, zener diode as voltage regulator.

Semiconductor Devices

1. Distinguish between conductors, insulators and semiconductors on the basis of energy

bands.

2. What are extrinsic semiconductors? Mention its types and explain the mechanism of

conduction in each.

3. Explain the conduction in N Type and P Type semiconductor on the basis of band theory.

4. Explain the formation of depletion layer and potential barrier in a PN junction diode.

5. Draw the circuit diagram used to determine the V-I characteristics of a diode and draw

the forward and reverse bias characteristics of a diode. Explain the conclusions drawn

from the graph.

6. With the help of a labeled circuit diagram explain the working of half wave rectifier and

draw the input and output waveforms.

7. With the help of a labeled circuit diagram explain the working of full wave rectifier and

draw the input and output waveforms.

8. Write notes on LED, photodiode and solar cell.

9. What is a Zener diode? Draw the V-I characteristics of zener diode. Explain Zener

breakdown and describe the use of a zener diode as a voltage regulator.

10. Explain the action of a PNP transistor and an NPN transistor.(Explain how conduction

takes place in NPN and PNP transistor.)

11. Draw the circuit diagram for determining transistor characteristics and describe the

input and output characteristics of transistor in CE configuration with relevant graphs.

12. Explain the working of Transistor amplifier in CE configuration with necessary circuit

diagram.

13. Draw the symbol, truth table and Boolean expression for OR, AND and NOT gate.

14. Draw the symbol and truth table of NOR gate and NAND gate.

15. Explain, how the fundamental logic gates can be realized using NOR gates alone.

16. Explain how the fundamental logic gates can be realized using NAND gates alone.


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