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 CBSE Physics. CBSE Board Exams. Entrance Exams. Admissions Test. Jobs Test. General Knowledge. All Grades Exams.

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

1. Which of the following is not the property of cathode rays ?

Question 1 of 15

2. A photosensitive metallic surface has work function, h v0. If photons of energy 2hvo fall on this surface, the electrons come out with a maximum velocity of 4 x 106 m/s. When the photon energy is increased to 5hvo, then maximum velocity of photoelectrons will be ?

Question 2 of 15

3. A 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 3 of 15

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

Question 4 of 15

5. In 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 5 of 15

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

Question 6 of 15

7. An 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. Monochromatic light of wavelength 667 nm is produced by a helium neon laser. the power emitted is 9 mW. The number of photons arriving per second on the average at a target irradiated by  this beam is ?

Question 8 of 15

9. In 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 9 of 15

10. A photocell employs photoelectric effect to convert ?

Question 10 of 15

11. A 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. In a discharge tube ionisation of enclosed gas is produced due to collisions between ?

Question 12 of 15

13. Monochromatic light of frequency of 6.0 x 1014 Hz is produced by a laser. The power emitted is 2 x 10-3 W. The number of photons emitted, on the average, by the source per second is ?

Question 13 of 15

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

Question 14 of 15

15. In 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 15 of 15

 Test By Subject CBSE Test By Topics Electrons and Photons