Physics What is refractive index ? It is defined as the ratio of speed of light in the medium to the speed of light in vacuum. None of above It is defined as the ratio of speed of light in vacuum to the speed of light in the medium. It is defined as the product of speed of light in medium and in vacuum. It is defined as the ratio of speed of light in the medium to the speed of light in vacuum. None of above It is defined as the ratio of speed of light in vacuum to the speed of light in the medium. It is defined as the product of speed of light in medium and in vacuum. ANSWER DOWNLOAD EXAMIANS APP
Physics An oil drop spreads over water because water has a higher surface tension Oil is more viscous Oil does not mix with water Oil is lighter than water water has a higher surface tension Oil is more viscous Oil does not mix with water Oil is lighter than water ANSWER DOWNLOAD EXAMIANS APP
Physics In the case of bodies falling under gravity which of the following remains constant at a given place? Acceleration Potential energy All listed here Kinetic energy Acceleration Potential energy All listed here Kinetic energy ANSWER DOWNLOAD EXAMIANS APP
Physics A piece of ice is floating in water kept in a beaker. When all the ice melts the level of water will First rise and then fall Fall Rise Remain the same First rise and then fall Fall Rise Remain the same ANSWER DOWNLOAD EXAMIANS APP
Physics For photoelectric effect to take place, the metal used as the cathode should have ________ Low work function High melting point Low melting point Low resistance Low work function High melting point Low melting point Low resistance ANSWER DOWNLOAD EXAMIANS APP
Physics When a ring of metal is heated what happens to its hole ? It expands or contracts according to its coefficient of expansion Expands It expands or contracts according to its diameter Contracts It expands or contracts according to its coefficient of expansion Expands It expands or contracts according to its diameter Contracts ANSWER DOWNLOAD EXAMIANS APP
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