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

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Mock Test for CUET Physics VII Dual Nature of Matter and Radiation

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VII Dual Nature of Matter and Radiation Mock Test for CUET Physics

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

Caesium Sodium Rubidium Cadmium

2. Photoelectric effect can be explained by

wave theory of light Bohr’s theory quantum theory of light corpuscular theory of light

3. Electron volt (ev) is the unit of

energy potential current charge

4. A strong argument for the particle nature of cathode rays is that they

produce fluoroscence travel through vacuum get deflected by electric and magnetic fields cast shadow

5. Photoelectric emmision occurs only when the incident light has more than a certain minimum

power wavelength intensity frequency

6. 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

the radiations which appeared to be coming from the anode the radiation which appeared to be coming from the cathode the protons coming from the cathode the protons coming from the anode

7. 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

frequency, energy shape, volume energy, frequency energy, momentum

8. The theory of quantisation of electric charge was given by

William Crookes J. J. Thomson R.A. Millikan Wilhelm Hallwachs

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

continuous emission of energy from radiation continuous absorption of energy from radiation discrete absorption of energy from radiation discrete emission of energy from radiation

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

total energy total momentum number of photons None of these

11. Light of a particular frequency υ is incident on a metal surface. When the intensity of incident radiation is increased, the photoelectric current

decreases increases remains unchanged sometimes increases and sometimes decreases

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

the frequency of the incident light the intensity of the incident light the nature of the cathode All of the above

13. Photoelectric effect is the phenomenon in which

photons come out of a metal when it is hit by a beam of electrons. photons come out of the nucleus of an atom under the action of an electric field. electrons come out of a metal with a constant velocity which depends on the frequency and intensity of incident light wave.

14. Einstein’s photoelectric equation is Ek : hν - Φ . In this equation Ek refers to

kinetic energy of all the emitted electrons mean kinetic energy of emitted electrons maximum kinetic energy of emitted electrons minimum kinetic energy of emitted electrons

15. In a photoelectric experiment the stopping potential for the incident light of wavelength 4000Å is 2 volt. If the wavelength be changed to 3000 Å, the stopping potential will be

2 V zero less than 2 V more than 2 V

16. Radiations of two photon’s energy, twice and ten times the work function of metal are incident on the metal surface successsively. The ratio of maximum velocities of photoelectrons emitted in two cases is

1 : 2 1 : 3 1 : 4 1 : 1

17. When the speed of electrons increase, then the value of its specific charge

increases decreases ramains unchanged increases upto some velocity

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

vary with intensity of light vary with frequency of light vary with speed of light vary irregularly

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

Thermionic emission X-rays emission Photoelectric emission Secondary emission

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

wavelength frequency amplitude angle of incidence

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CUET Physics VII Dual Nature of Matter and Radiation Mock Test

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Mock Tests for Physics CUET VII Dual Nature of Matter and Radiation

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