TN Phy, Important 2 Marks

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Class : XII

Subject : Physics

2 Marks

1. State Coulomb’s law

2. What is action of points or Corona discharge ?

3. Define : capacitance and its unit.

4. List the uses of capacitors

5. Define : Dipole and dipole moment.

6. State Gauss’s law.

7. Define : Electric flux and write its units.

8. Define : Energy density.

9. Define : Electrostatic potential and Electrostatic potential energy.

10. Define : Resistivity.

11. Define : Temperature co-efficient of resistance.

12. State Ohm’s law and define resistance.

13. Define : Drift velocity.

14. Define current and write the conventional direction of current 

15. State Kirchoff’s laws.

16. What is Seebeck effect or thermoelectric effect ? / thermoemf /thermoelectric current/ thermocouple.

17. What is Peltier effect ?

18. Explain Thompson effect and its types.

19. Write four properties of magnet (*Magnetic length)

20. List the properties of lines of forces (magnetic field lines).

21. Define : magnetic dipolemoment.

22. State Ampere circuital law 

23. Define Displacement current.

24. What are Fraunhofer dark lines ? mention their use.

25. List the uses of IR rays and UV rays.

26. Distinguish between emission spectrum and absorption spectrum.

27. Write Maxwells four equations in the integral form.

28. Define : work function.

29. What is photoelectric effect ?

30. Write the applications of X-rays.

31. List the applications of Photocell.

32. Define : specific charge.

33. List the properties of cathode rays.

34. Define : Distance of closest approach

35. Write the properties of Nuclear forces

36. Define : Half life and Mean life.

37. Define : Doping

38. What is biasing ? What are the types of biasing ?

39. Define : Rectification

40. Define : Modulation. Mention its types

41. List the advantages and disadvantages of AM and FM

42. Define : Nano technology

43. Describe a Nano particle

44. What is Robotics

45. State the laws of reflection

46. List the characteristics of image formed by a plane mirror

47. Distinguish between Paraxial lines and Marginal lines

48. Define : Magnification

49. State the laws of refraction

50. List the uses of polaroids.

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