Physics What is refractive index ? 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. None of above It is defined as the ratio of speed of light in the medium to the speed of light in vacuum. 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. None of above It is defined as the ratio of speed of light in the medium to the speed of light in vacuum. ANSWER DOWNLOAD EXAMIANS APP
Physics The velocity of the sound is highest in Metal Air Water Vacuum Metal Air Water Vacuum ANSWER DOWNLOAD EXAMIANS APP
Physics The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be: 8 T 1 T 2 T 4 T 8 T 1 T 2 T 4 T ANSWER DOWNLOAD EXAMIANS APP
Physics Heavy water is used in nuclear reactor to Increase temperature Absorb neutron Slow down neutron Increase speed of neutron Increase temperature Absorb neutron Slow down neutron Increase speed of neutron ANSWER DOWNLOAD EXAMIANS APP
Physics Woollen cloth protects the body from cold because It is a poor conductor of heat External heat rays enter into the body through the woollen cloth It reflects heat It is a good conductor of heat It is a poor conductor of heat External heat rays enter into the body through the woollen cloth It reflects heat It is a good conductor of heat ANSWER DOWNLOAD EXAMIANS APP
Physics When the milk is churned vigorously the cream from it is separated out due to Centrifugal force Gravitational force Frictional force Centripetal force Centrifugal force Gravitational force Frictional force Centripetal force ANSWER DOWNLOAD EXAMIANS APP
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