Nuclear Physics and Laser TNPSC Group 1 Questions

Physics

Nuclear Physics and Laser MCQ Questions

1.
Atom bomb is based on the principle of
A.
Nuclear Fusion
B.
Nuclear fission
C.
Chemical reaction
D.
None of these
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ANSWER :
B. Nuclear fission
2.
Which of the following waves/ rays are produced by nuclear changes in the atom?
A.
infrared rays
B.
lights waves
C.
x-rays
D.
gamma rays
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ANSWER :
D. gamma rays
3.

Match List I correctly with List II and select your answer using the codes given below:

List I List II
a) Bohr 1.) Neutron
b) Einstein 2.) Model of the hydrogen atom
c) Chadwick 3.) matter waves
d) De Broglie 4.) photoelectric effect
A.

a-2,b-4,c- 3,d-1

B.

a-1,b-3,c-2,d-4

C.

a-2,b-4,c- 1,d-3

D.

a-3,b-2,c- 4,d-1

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ANSWER :

C. a-2,b-4,c- 1,d-3

4.

The size of the atomic nucleus is

A.

10-14 m

B.

10-16 m

C.

10-24 m

D.

10-6 m

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ANSWER :

A. 10-14 m

5.
Elements having different atomic number but same atomic weight are called
A.
Isotopes
B.
Isobars
C.
Isomers
D.
Isotones
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ANSWER :
B. Isobars
6.
Nucleus of an atom has
A.
electrons
B.
protons
C.
protons and neutrons
D.
electrons and protons
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ANSWER :
C. protons and neutrons