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CTET Prep: Science Questions - Physics - Modern Physics
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Modern physics is a branch of physics that deals with the post-Newtonian concepts in the world of physics. It is based on the two major breakthroughs of the twentieth century: Relativity and Quantum Mechanics. Quantum effects typically involve distances related to atoms.

CTET Prep: Science Questions - Physics - Modern Physics
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25 Questions

1. A radioactive substance has a halflife of 4 months. Three fourths of the substance will decays in
2. The nuclear 6C13 and 7N14 can be described as
3. The equation given below shows the disintegration of the radioactive isotope of hydrogen 3 3 1T 2He X Which one of the following is X in the equation?
4. Photocells are used for the
5. If a proton of mass is moving with the velocity of light, its mass will be
6. Beta rays emitted by radioactive substance are
7. The colour of the +ve column in a gas discharge tube depends on
8. The nucleus of an atom consists of
9. Voltage applied between the electrodes of discharge tube is of the nature
10. Superconductivity
11. An atom bomb is based upon the principle of
12. In the following reaction 24 4 1 12Mg 2 He 14Si 0 x n , x is
13. In a discharge tube at 0.2 mm of Hg pressure, there is a formation of
14. In b-decay
15. Which of the following statement is correct?
16. Nuclear forces are mediated by
17. The maximum number of photo electrons released in photocell is independent of
18. Pick out the statement which is true
19. What was the fissionable material used in the bomb dropped at Nagasaki (Japan) in the year 1945?
20. 228 12 Ra nucleus there are
21. In the following nuclear reaction, 6 11 11C 5 B+ X What does X stand for?
22. The nuclear force
23. Which of the particles has similar mass to that of the electron?
24. If alpha, beta and gamma rays carry same momentum, which has the longest wavelength?
25. An atomic pile is used for

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