Nuclear Physics and Laser TNPSC Group 2 2A Questions

Physics

Nuclear Physics and Laser MCQ Questions


7.
In india, Apsara is connected with
A.
Nuclear reactor
B.
Dancer
C.
Goddess
D.
Military tank
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ANSWER :
A. Nuclear reactor
8.
Excited atoms gives rise to ________ spectrum
A.
absorption
B.
continous
C.
line
D.
raman
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ANSWER :
C. line
9.
In an atom, the order of filling up of the orbitals is governed by
A.
Aufbau principle
B.
Heinsenberg's uncertainty principle
C.
Hund's rule
D.
Pauli's exclusion principle
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ANSWER :
A. Aufbau principle
10.
the difference between a nuclear reactor and an atomic bomb is that
A.
no chain reaction take place in nuclear reactor while in the atomic bomb there is a chain reaction
B.
the chain reaction in nuclear reactor is controlled
C.
the chain reaction in nuclear reactor is not controlled
D.
no chain reaction takes place in atomic bomb while it takes place in nuclear reactor
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ANSWER :
B. the chain reaction in nuclear reactor is controlled
11.
The alpha particle carries two positive charges. Its mass is very nearly equal to that of
A.
two protons
B.
an atom of helium
C.
sum of masses of two positrons & two neutrons
D.
two positrons as each position carries a single positive charge
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ANSWER :
B. an atom of helium
12.
Alpha rays are
A.
positively charged particles
B.
negatively charged particles
C.
chargeless particles
D.
electromagnetic radiators
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ANSWER :
A. positively charged particles