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Atoms Molecules Nuclei Electrons Photons Test Online

Test Name Atoms, Molecules, Nuclei, Electrons & Photons Test
Subject Physics
Test Type MCQs
Total Question 15
Total Marks 30
Total Time 15 Mints
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Atoms Molecules Nuclei Electrons Photons Test Online

Physics

1. Which one of the following is not dependent on the intensity of incident photon in a photo electric experiment?

 

Question 1 of 15

2. A laser beam is used for carrying out surgery because it:

 

Question 2 of 15

3. The function of heavy water in a nuclear reactor to

 

Question 3 of 15

4. In the nuclear reaction, there is a conservation of:

 

Question 4 of 15

5. The kinetic energy of an electron, which is accelerated in the potential difference of 100 V, is:

 

Question 5 of 15

6. If the radioactive decay constant of radium is 1.07 x 10⁻⁴ per year. Then its half life period approximately is equal to:

 

Question 6 of 15

7. In Bohr’s theory, relation between principal quantum number n and radius of orbit r is:

 

Question 7 of 15

8. A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 kV, its kinetic energy will be

 

Question 8 of 15

9. The speed of an electron having a wavelength of 10⁻¹⁰ m is:

 

Question 9 of 15

10. Particle nature and wave nature of electromagnetic waves and electrons can be represented by:

 

Question 10 of 15

11. In ₈₈Ra²²⁶ nucleus there are:

 

Question 11 of 15

12. For an electron in the second orbit of hydrogen the moment of momentum as per Bohr’s model is

 

Question 12 of 15

13. When radioactive substance emits an α-particle, then its position in the periodic table is lowered by:

 

Question 13 of 15

14. The surface of zone material is radiated in turn by waves of λ = 350 nm and 540 nm respectively. The ratio of the stopping potential in the two cases is 2:1. The work function of the material is

 

Question 14 of 15

15. Half life of a substance is 20 minutes and then the time between 33% decay and 67 % decay will be

 

Question 15 of 15


 

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