Engineering :: Nuclear Engineering
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1. |
The nucleus of an atom consists of |
A. |
protons only |
B. |
protons and electrons |
C. |
protons and neutrons |
D. |
protons neutrons and electrons |
Answer: Option C
Explanation:
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2. |
A proton is identical with |
A. |
ionised hydrogen molecule |
B. |
the nucleus of hydrogen atom |
C. |
the nucleus of deuterium |
D. |
an ?-ray particle |
Answer: Option B
Explanation:
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3. |
The electron is identical with |
A. |
hydrogen ion |
B. |
positron |
C. |
an ?-ray particle |
D. |
an ?-ray particle |
Answer: Option D
Explanation:
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4. |
In an atom the electrons |
A. |
move round the nucleus at random |
B. |
are embedded in space around the nucleus |
C. |
are distributed as three dimensional charge clouds around the nucleus |
D. |
are stationary in various energy levels |
Answer: Option C
Explanation:
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5. |
The electron is a particle with a mass of about |
A. |
1/18 of the lightest nucleus |
B. |
1/180 of the lightest nucleus |
C. |
1/1800 of the lightest nucleus |
D. |
1/18000 of the lightest nucleus |
Answer: Option C
Explanation:
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6. |
The positron is almost as heavy as |
A. |
an electron |
B. |
a proton |
C. |
a neutron |
D. |
a meson |
Answer: Option A
Explanation:
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7. |
Positive ions are formed from neutral atoms by the loss of |
A. |
neutrons |
B. |
protons |
C. |
electrons |
D. |
mesons |
Answer: Option C
Explanation:
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8. |
An electrovalent compound is made up of |
A. |
neutral atoms |
B. |
electrically charged atoms or groups of atoms |
C. |
electrically charged molecules |
D. |
neutral molecules |
Answer: Option B
Explanation:
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9. |
The life of a meson is about |
A. |
10-18 sec |
B. |
10-2 sec |
C. |
10-18 sec |
D. |
1 sec |
Answer: Option A
Explanation:
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10. |
The mass of a meson with charge +e is |
A. |
equal to that of a proton |
B. |
equal to that of an electron |
C. |
275 times that of an electron |
D. |
1/1850 of the mass of an electron |
Answer: Option C
Explanation:
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