Composition and Size of Nucleus (Atomic Masses, Mass-Energy Relation, Mass Defect...) NEET Questions

Physics - Atoms and Nuclei

Composition and Size of Nucleus (Atomic Masses, Mass-Energy Relation, Mass Defect...) MCQ Questions


1.
Which of the following particles constitute the nucleus of an atom?
A.
Protons only
B.
Neutrons only
C.
Protons and neutrons
D.
Electrons and protons
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ANSWER :
C. Protons and neutrons
2.
If the mass number of a nucleus is doubled, its radius will change by a factor of:
A.
2
B.
4
C.
√2
D.
√3
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ANSWER :
C. √2
3.
Which force is responsible for binding protons and neutrons inside the nucleus?
A.
Gravitational force
B.
Electromagnetic force
C.
Nuclear force
D.
Weak nuclear force
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ANSWER :
C. Nuclear force
4.
The mass defect of a nucleus is due to:
A.
Loss of charge
B.
Loss of protons
C.
Difference in binding energy
D.
Loss of electrons
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ANSWER :
B. Loss of protons
5.
Which of the following particles determines the atomic number of an element?

NEET - 2015

A.
Proton
B.
Neutron
C.
Electron
D.
Positron
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ANSWER :
A. Proton
6.
Which equation represents Einstein’s mass-energy relation?
A.
E = mc²
B.
E = m/c²
C.
E = mc
D.
E = mc^2 - 1
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ANSWER :
A. E = mc²