Capillary action is the phenomenon by which any liquid rises up in a wick or tube. It is due to surface tension of liquids. The height of rice up of liquid is depend upon surface tension of the water. This is occurs in small plants also.
52) oil raise up the wick in a lamp. The principle involves
Answer is:
capillary action phenomenon
Explanation:
Related General Physics MCQ with Answers
Answer is:
offer no resistance to the flow of electricity
Explanation:
Superconductor is the property in which 0 resistence obtained at a certain temperature and in a some substance. Ex. Mercury which shows superconductivity phenomena below the temperature 4. 3 k.
Answer is:
vaccum
Explanation:
Light waves are transverse waves they do not require material medium to travel. Hence they are called electromagnetic waves. Light waves travel in vacuum with the velocity 3*10^7 m/s.
Answer is:
necessary centripetal force may be obtained from the horizontal component of the weight of the train
Explanation:
The reason for this to happen is because of the presence of centrifugal force that tends to push the circularly moving object away from the center. The same thing happens when a train is moving at a fast pace over a curve. On a flat track, the train would experience pushing and that can move the center of gravity away. To counter this, the curves are banked in order to get the trains to slightly tilt towards the interior so that the centrifugal force can be countered.
Answer is:
metals are good conductor of heat
Explanation:
Actually the correct answer would be metals have high thermal conductivity than plastics as soon as you touch the pen your body heat is emitted onto the metal cap faster as you are cold metal cap becomes cooler.