12th Physics Chapter 10 Important Questions
12 ஆம் வகுப்பு இயற்பியல் பாடம் 10 முக்கியமான வினாக்கள்
12th Physics Chapter 10 Important - 2 Marks
- 1. What is meant by doping? (MAR 20, MAY 22)
- 2. Define forbidden energy gap.
- 3. Why is temperature co-efficient of resistance negative for semiconductor?
- 4. What do you mean by leakage current in a diode
- 5. Give the Barkhausen conditions for sustained oscillations.
- 6. Explain the need for a feedback circuit in a transistor oscillator.
- 7. What is meant by biasing? Mention its types. (MAR 24)
- 8. Why are NOR and NAND gates called universal gates?
- 9. Define barrier potential.
- 10. What is rectification? (JULY 22, JUNE 24)
- 11. What do you mean by skip distance? (SEP 20)
- 12. Draw the circuit diagram of full wave rectifier. (MAR 23)
- 13. What is skip area? (MAR 20)
- 14. Draw the circuit diagram for a forward biased p-n junction diode. (MAR 25)
- 15. A diode is called as a unidirectional device. Explain.
- 16. What is Bandwidth Communication?
- 17. List out the mobile communication.
.
12th Physics Chapter 10 Important - 3 Marks
- 1. Distinguish between intrinsic and extrinsic semiconductors. (JUNE 23,MAR 25)
- 2. Draw the input and output waveforms of a full wave rectifier. (AUG 21)
- 3. Distinguish between avalanche breakdown and Zener breakdown.
- 4. What is an LED? Explain the working principle of a LED. Mention its applications.
- 5. Give the principle of solar cells.
- 6. Give applications of RADAR.
- 7. Fibre optic communication is gaining popularity among the various transmission media. (SEP 20)
- 8. Explain the working principle of a solar cell. Mention its applications.
- 9. Transistor functions as a switch. Explain.
- 10. Explain the amplitude modulation with necessary diagrams.
- 11. What is Frequency Modulation? List out the advantages and limitations of frequency modulation. (AUG 21, JUNE 23, MAR 24)
- 12. What is meant by satellite communication? Give its applications.
- 13. Draw the circuit diagram of NPN transistor in common base configuration.
- 14. Draw the circuit diagram of NPN transistor in common emitter configuration. (MAY 22)
- 15. What is Zener diode? Mention any two uses of Zener diode. (JULY 22)
- 16. Modulation helps to reduce the antenna size in wireless communication – Explain. (MAR 20)
- 17. The given circuit has two ideal diodes connected as shown in figure below. Calculate the current flowing through the resistance R1. (EX-1) (MAR 23)
- 18. What is the output (Y) Boolean expression for the following circuit with inputs A , B and C. (SEP 20)
- 19. In the circuit shown in the figure, the input voltage 𝑉𝑖 is 20 𝑉, 𝑉𝐵𝐸 = 0 𝑉 and 𝑉𝐶𝐸 = 0 𝑉. What are the values of 𝐼c, IB, β? (Exam- 10.6) (MAR 20)
- 20. Determine the wavelength of light emitted from LED which is made up of GaAsP semiconductor whose forbidden energy gap is 1.875 eV. Mention the colour of the light emitted (Take h = 6.6 × 10–34 Js). (Exam 10.4) (MAR 24)
12th Physics Chapter 10 Important - 5 Marks
- 1. Draw the circuit diagram of a half wave rectifier and explain its working. (JUNE 24)
- 2. Explain the construction and working of a full wave rectifier. (MAY 22)
- 3. Describe the function of a transistor as an amplifier with the neat circuit diagram. Sketch the input and output wave forms. (SEP 20, MAR 23)
- 4. State and prove De Morgan‟s first and second theorem. (JULY 22, JUNE 23,24,MAR 25)
- 5. Explain the basic elements of communication system with the necessary block diagram.
- 6. Explain the ground wave propagation and space wave propagation of electromagnetic waves through space.
- 7. Explain the working of the transistor as an oscillator. (MAR 20)
.jpg)
