16.The sun continuously produces an enormous amount of energy. This is due
to
(a) nuclear fission
(b) nuclear fusion
(c) chemical combustion
(d) boiling
Ans: (b)
17.The unit of power in SI is
(a) Joule
(b) Newton
(c) Joule/Sec
(d) Erg/Sec
Ans: (c)
18.Where does the centre of gravity of a rubber ring lie?
(a) on the outer surface
(b) in the inner surface
(c) at the centre of the ring
(d) None of the above
Ans: (c)
19.If an empty cylinder Is half ruled with a liquid, Its centre of gravity is
(a) shifted upwards
(b) shifted downwards
(c) shifted neither upward nor downward
(d) shifted upward or downward depending on the density of the liquid
Ans: (b)
20.Who discovered that the Cree Call acceleration is the same for any object at
a given place?
(a) Newton
(b) Pascal
(c) Archimedes
(d) Galileo
Ans: (d)
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