Physics A convex mirror of focal length f (in air) is immersed in a liquid (u=4/3). The focal length of the mirror in the liquid will be : (3/4)f (4/3)f (7/3)f F (3/4)f (4/3)f (7/3)f F 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 1 MeV 0.1 MeV 10 MeV 100 MeV 1 MeV 0.1 MeV 10 MeV 100 MeV ANSWER DOWNLOAD EXAMIANS APP
Physics The shape of our milky way galaxy is Circular None of these Elliptical Spiral Circular None of these Elliptical Spiral ANSWER DOWNLOAD EXAMIANS APP
Physics In a optical fibre cable, the signal is propagated along the Both core and cladding Inner Core Surface and cladding Cladding Both core and cladding Inner Core Surface and cladding Cladding ANSWER DOWNLOAD EXAMIANS APP
Physics Planets do not twinkle because Their distance from the earth does not change with time They are nearer to earth and hence we receive a greater amount of light. They are very far away from the earth resulting in decrease in intensity of light They emit light of a constant intensity Their distance from the earth does not change with time They are nearer to earth and hence we receive a greater amount of light. They are very far away from the earth resulting in decrease in intensity of light They emit light of a constant intensity ANSWER DOWNLOAD EXAMIANS APP
Physics Why the needle of iron swims on water surface when it is kept gently ? Due to surface tension The density of needle is less than that of water Due to its shape It will remain under the water, when it will displace more water than its weight Due to surface tension The density of needle is less than that of water Due to its shape It will remain under the water, when it will displace more water than its weight ANSWER DOWNLOAD EXAMIANS APP
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