Dual Nature of Radiation and Matter MCQs Mock Test of Class 12th Physics

Welcome to your Dual Nature of Radiation and Matter MCQs Mock Test of Class 12th Physics

1. 
Question 1. The charge of a photo electron is :

2. 
Question 2. The number of photons of frequency n present in energy E, in terms of Planck’s constant h:

3. 
Question 3. Compared to liquids and solids, gases are:

4. 
Question 4. The different stages of discharge in a discharge tube can be explained on the basis of

5. 
Q.5. Cathode ray consists of

6. 
Q.6. In the photoeletric effect, electrons are emitted

7. 
Q.7. The minimum energy required to eject an electron, from the metal surface is called

8. 
Q.8. The work function for photoelectric effect

9. 
Q.9. A discharge takes place between the two electrodes on applying the electric field to the gas in the discharge tube. The cause of this fluorescence was attributed to

10. 
Q.10. The presently accepted value of charge/mass (e/m) is

11. 
Q.11. In which of the following, emission of electrons does not take place?

12. 
Q.12. Photoelectric emission occurs only when the incident light has more than a certain minimum

13. 
Q.13. Which of the following when falls on a metal will emit photoelectrons ?

14. 
Q.14. Particle like behavior of light arises from the fact that each quanta of light has definite …X… and a fixed value of …Y.. just like a particle, Here, X and Y refer to

15. 
Q.15. The wave nature of light was established by (i) Maxwell’s equations (ii) Fraunhoffer’s lines (iii) Hertz experiment (iv) Einstein’s theory

16. 
Q.16. The work-function of a metal is

17. 
Q.17. The work function of a metal is independent of (i) nature of the surface of the metal (ii) dimensions of the metal (iii) properties of the metal (iv) abundance of the metal

18. 
Q.18. The theory of quantisation of electric charge was given by

19. 
Q.19. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimum

20. 
Q.20. Which of the following metals is not sensitive to visible light?

21. 
Q.21. A photosensitive substance emits _____when illuminated by light.

22. 
Q.22. The photoelectric current does not depend upon the (i) frequency of incident light (ii) work function of the metal (iii) stopping potential (iv) intensity of incident light

23. 
Q.23. The stopping potential is directly related to

24. 
Q.24. The wave theory of light does not explain

25. 
Q.25. Photoelectric effect can be explained by

26. 
Q.26. In Einstein’s picture of Photoelectric emission, the photoelectric emission does not take place by

27. 
Q.27. The particle nature of light is not confirmed by

28. 
Q.28. Photons are deflected by

29. 
Q.29. Electrically, photons are

30. 
Q.30. In a photon-particle collision, the quantity that does not remain conserved is

31. 
Q.31. Of the following properties, the photon does not possess

32. 
Q.32. It is essential to consider light as a stream of photons to explain

33. 
Q,33. Photoelectric effect was discovered by

34. 
Q.34. The momentum of a photon of wavelength λ is

35. 
Q.35. The photo-electrons emitted from a metal surface are such that their velocity

36. 
Q.36. Photoelectric effect shows

37. 
Q.37. A photoelectric cell converts

38. 
Question 38. Millikan’s oil drop experiment makes use of:

39. 
Q.39. The photoelectric effect is based on the law of conservation of

40. 
Q.40. The photoelectric effect can be understood on the basis of

41. 
Q.41. When light is incident on a metal surface the maximum kinetic energy of emitted electrons

42. 
Q.42. The maximum energy of electrons released in a photocell is independent of

43. 
Q.43. Einstein’s photoelectric equation states that hν = W0 + Ek. In this equatin, Ek refers to the

44. 
Q.44. Photoelectric effect is the phenomenon in which

45. 
Q.45. A photoelectric cell is a device which

46. 
Q.46. Which of the following shows particle nature of light?

47. 
Question 47. De-Broglie equation states the:

48. 
Question 48. Protons and alpha particles have the same de-Broglie wavelength. What is same for both of them ?

49. 
Question 49. Kinetic energy of emitted electrons depends upon :

50. 
Question 50. De-Broglie wavelength of a body of mass m and kinetic energy E is given by (symbols have their usual meanings):

Leave a Reply

Your email address will not be published.