Atoms Molecules Nuclei Electrons Photons Test Online MCQs
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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. A laser beam is used for carrying out surgery because it:

 

Question 1 of 15

2. A radioactive substance decays to 1/16th of its initial activity in 40 days. The half-life of the radioactive substance expressed in days is

 

Question 2 of 15

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

 

Question 3 of 15

4. Which one of the following has the highest neutrons ratio?

 

Question 4 of 15

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

 

Question 5 of 15

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

 

Question 6 of 15

7. X-ray will not show the phenomenon of

 

Question 7 of 15

8. 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 8 of 15

9. In ₈₈Ra²²⁶ nucleus there are:

 

Question 9 of 15

10. Consider the following nuclear reaction X²⁰⁰ A¹¹⁰ + B⁹⁰ + Energy If the binding energy per nucleon for X, A and B are 7.4 MeV, and 8.2 MeV and 8.2 MeV respectively, the energy released will be:

 

Question 10 of 15

11. 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 11 of 15

12. The reaction responsible for the production of light energy from the sun will be:

 

Question 12 of 15

13. 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 13 of 15

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

 

Question 14 of 15

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

 

Question 15 of 15


 

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