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General Knowledge - Physics

Exercise : Physics - Section 1
  • Physics - Section 1
41.
oil raise up the wick in a lamp. The principle involves
the diffusion of oil through the wick
the liquid state of oil
capillary action phenomenon
volatility of oil
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
Superconductors are substances which
conduct electricity at low temperature
offer high resistance to the flow of current
offer no resistance to the flow of electricity
conduct electricity at high temperatures
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
Light travels at the fastest speed in
glass
water
hydrogen
vacuum
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
Railway tracks are banked on curves
necessary centrifugal force may be obtained from the horizontal component weight of the train
to avoid frictional force between the tracks and wheels
necessary centripetal force may be obtained from the horizontal component of the weight of the train
the train may not fly off in the opposite direction
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because
metals have higher thermal capacity than plastics
plastics have a lower density than metals
metals are good conductor of heat
plastics have a higher thermal conductivity than metals
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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