Modern Physics CDS Questions

CDS Physics

Modern Physics MCQ Questions


1.
Who proposed the plum pudding model of the atom?
A.
Ernest Rutherford
B.
J.J. Thomson
C.
Niels Bohr
D.
James Chadwick
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ANSWER :
B. J.J. Thomson
2.
The nucleus of an atom was discovered by:
A.
Niels Bohr
B.
J.J. Thomson
C.
Ernest Rutherford
D.
James Chadwick
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ANSWER :
C. Ernest Rutherford
3.
Fill in the blank: The size of an atom is approximately _____ times larger than its nucleus.
A.
10
B.
1000
C.
10,000
D.
100,000
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ANSWER :
D. 100,000
4.
Which of the following is NOT a fundamental particle of an atom?
A.
Proton
B.
Neutron
C.
Electron
D.
Photon
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ANSWER :
D. Photon
5.
What is the SI unit of atomic mass?
A.
Kilogram
B.
Gram
C.
Atomic Mass Unit (amu)
D.
Electronvolt (eV)
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ANSWER :
C. Atomic Mass Unit (amu)
6.
In a Geiger-Marsden experiment, alpha particles were scattered by:
A.
Gold foil
B.
Silver foil
C.
Platinum foil
D.
Copper foil
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ANSWER :
A. Gold foil