CBSE Physics Electrons And Photons Test 2 Online
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CBSE Physics Electrons and Photons Test 2 Online

Test Name Electrons and Photons Test
Subject CBSE Physics
Test Type MCQs
Total Question 25
Total Marks 50
Total Time 20 Minutes
Test Help For
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Central Board of Secondary Education, CBSE is a Board of Education for public and private schools all India and they are responsible all subjects. Science subject Physics read and guide in all classes on regular basis. Our topics is Electrons and Photons from upper classes syllabus for preparation online. All students get most helpful questions answers test to take online and get some important rank score in examinations results.

CBSE Physics Electrons and Photons Test 2 Online


1. mark reviewIn a photosensitive cell, with exciting wavelength λ the fastest electron has speed v. If the existing wavelength is changed to 3λ/4, the speed of the fastest emitted electron will be ?

Question 1 of 15

2. mark reviewwhen ultraviolet rays are incident on metal plate, the photoelectric effect does not occur. It occurs by incidence of ?

Question 2 of 15

3. mark reviewIn X-rays diffraction experiment distance between atomic lattice planes of diffraction grating is 2.8 x 10-10m then the maximum wavelength of X-rays (in metre) is ?

Question 3 of 15

4. mark reviewIn a mas spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electric potential V and then made to describe semicircular paths of radius R  using a magnetic field B. If V and B are kept constant, the ratio [charge on the ion/mass of the ion] will be proportional too ?

Question 4 of 15

5. mark reviewThe following particles are moving with the same velocity, then maximum de-Broglie wavelength will be for ?

Question 5 of 15

6. mark reviewThe work function of a surface of a photosensitive material is 6.2 eV. The wavelength of the incident radiation for which the stopping potential is 5 V lies in the ?

Question 6 of 15

7. mark reviewAn electron moves with a velocity 1 x 103 m/s in a magnetic field of induction 0.3 T at an angle 30°. If e/m of electron is 1.76 x 1011 C/Kg, the radius of teh path is nearly ?

Question 7 of 15

8. mark reviewA photoelectric cell is illuminated by a point source of light 1 m away. When the source is shifted 2 m, then ?

Question 8 of 15

9. mark reviewWhich of the following is not the property of cathode rays ?

Question 9 of 15

10. mark reviewEinstein's work on photoelectric effect gives support to ?

Question 10 of 15

11. mark reviewA particle of mass 1 mg has the same wavelength as an electron moving with a velocity of 3 x 106 mas-1. The velocity of the particle is (mass of electron = 9.1 x 10-31 kg) ?

Question 11 of 15

12. mark reviewJ J Thomson's cathode ray tube experiment demonstrated that ?

Question 12 of 15

13. mark reviewIn the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of ?

Question 13 of 15

14. mark reviewA photocell employs photoelectric effect to convert ?

Question 14 of 15

15. mark reviewA 5 W source emits monochromatic light of wavelength 5000 A. When placed 0.5 m away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of 1.0 m, the number of photoelectrons liberated will be reduced by a factor of ?

Question 15 of 15


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