Physics Which layer of the earth's atmosphere reflect back the radio waves to the earth's surface ? Exosphere Ionosphere Mesosphere Stratosphere Exosphere Ionosphere Mesosphere Stratosphere ANSWER DOWNLOAD EXAMIANS APP
Physics A circular plate, a cube and a sphere, all made up of same material and having the samemass, are heated to 300°C and left in a room. Which of them will have the slowest rate of cooling? All will cool at the same rate Sphere Cube Circular plate All will cool at the same rate Sphere Cube Circular plate ANSWER DOWNLOAD EXAMIANS APP
Physics It is more difficult to walk on a sandy road than on a concrete road because sand is soft and concreter is hard. the friction between sand and feet is more than that between concrete and feet. the sand is grainy but concrete is smooth. the friction between sand and feet is less than that between concrete and feet. sand is soft and concreter is hard. the friction between sand and feet is more than that between concrete and feet. the sand is grainy but concrete is smooth. the friction between sand and feet is less than that between concrete and feet. ANSWER DOWNLOAD EXAMIANS APP
Physics Period of oscillation of 3 cm microwaves in seconds is 1 × 10–10 0.001 0.01 1 × 1010 1 × 10–10 0.001 0.01 1 × 1010 ANSWER DOWNLOAD EXAMIANS APP
Physics In case of uniform circular motion, the acceleration is Variable in magnitude but constant in direction Constant in magnitude and directed radially inwards Zero Variable in magnitude but tangential to the circle Variable in magnitude but constant in direction Constant in magnitude and directed radially inwards Zero Variable in magnitude but tangential to the circle ANSWER DOWNLOAD EXAMIANS APP
Physics The impurity atoms with which silicon should be doped to make p-type semiconductors are Boron Phosphorus Antimony Germanium Boron Phosphorus Antimony Germanium ANSWER DOWNLOAD EXAMIANS APP
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