Physics Why does ice covered in sawdust not melt quickly ? The water is absorbed by sawdust Sawdust is a bad conductor of heat Sawdust is good conductor of heat Sawdust does not allow the air to touch the ice The water is absorbed by sawdust Sawdust is a bad conductor of heat Sawdust is good conductor of heat Sawdust does not allow the air to touch the ice ANSWER DOWNLOAD EXAMIANS APP
Physics Superconductors are those elements Whose resistance falls almost to zero at very low temperatures Which turn into insulators at very low temperatures Whose conductivity is intermediate between metals and insulators Which conduct electricity only at super-high temperatures Whose resistance falls almost to zero at very low temperatures Which turn into insulators at very low temperatures Whose conductivity is intermediate between metals and insulators Which conduct electricity only at super-high temperatures ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following features of a tunnel diode is its drawback Instability due to negative resistance Very low power consumptions Very wide temperature range of operations Extremely high frequency response Instability due to negative resistance Very low power consumptions Very wide temperature range of operations Extremely high frequency response ANSWER DOWNLOAD EXAMIANS APP
Physics When pressure is increased the melting point of ice Does not change Decreases Increases Depends on the impurities in the ice Does not change Decreases Increases Depends on the impurities in the ice ANSWER DOWNLOAD EXAMIANS APP
Physics In which one of the following the phenomenon of total internal reflection of light is used ? Working of binoculars Formation of rainbow Formation of mirage Twinkling of stars Working of binoculars Formation of rainbow Formation of mirage Twinkling of stars ANSWER DOWNLOAD EXAMIANS APP
Physics An object at rest may have Potential energy Velocity Momentum Kinetic energy Potential energy Velocity Momentum Kinetic energy ANSWER DOWNLOAD EXAMIANS APP
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