CUET Physics Mock Test VII Dual Nature of Matter and Radiation Set B

1. The wave theory of light does not explain

2. Electrically, photons are

3. The photoelectrons emitted from a metal surface are such that their velocity

4. The photoelectric effect can be understood on the basis of

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

6. Which of the following shows particle nature of light?

7. According to Einstein’s photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal Vs the frequency of the incident radiation gives as straight the whose slope

8. A photocell is illuminated by a small bright source placed 1 m away. When the same source of light is placed 2 m away, the number of electrons emitted by photocathode are reduced by a factor of

9. In the Davisson and Germer experiment, the velocity of electrons emitted from the electron gun can be increased by

10. When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is

11. The photoelectrons emitted from a metal surface are such that their velocity

12. The work-function of a metal is

13. The stopping potential is directly related to

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

15. The photoelectric effect is based on the law of conservationof

16. The work function for photoelectric effect

17. The energy of photon of wavelength λ is

18. Light from a hydrogen discharge tube is incident on the cathode of a photoelectric cell, the work function of the cathode surface is 4.2 eV. In order to reduce the photocurrent to zero the voltage of the anode relative to the cathode must be made

19. A photoelectric cell is a device which

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