Physics To measure the speed of an approaching car a police officer shines Radio waves on it Ultra high frequency waves on it Light waves on it Microwaves on it Radio waves on it Ultra high frequency waves on it Light waves on it Microwaves on it ANSWER DOWNLOAD EXAMIANS APP
Physics 'Mirage' is an example of Total internal reflection of light only Refraction of light only Refraction and total internal reflection of light Dispersion of light only Total internal reflection of light only Refraction of light only Refraction and total internal reflection of light Dispersion of light only ANSWER DOWNLOAD EXAMIANS APP
Physics Period of oscillation of 3 cm microwaves in seconds is 1 × 1010 0.001 1 × 10–10 0.01 1 × 1010 0.001 1 × 10–10 0.01 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 4 T 2 T 1 T 8 T 4 T 2 T 1 T ANSWER DOWNLOAD EXAMIANS APP
Physics The velocity of sound in air Does not depend on temperature Decreases with increase of temperature Increases with decrease of temperature Decreases with decrease of temperature Does not depend on temperature Decreases with increase of temperature Increases with decrease of temperature Decreases with decrease of temperature ANSWER DOWNLOAD EXAMIANS APP
Physics The energy of a photon, whose momentum is 10 MeV/c, where c is the speed of light, is given by 100 MeV 10 MeV 0.1 MeV 1 MeV 100 MeV 10 MeV 0.1 MeV 1 MeV ANSWER DOWNLOAD EXAMIANS APP
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