Physics Oil raise up the wick in a lamp. The principle involves capillary action phenomenon volatility of oil the diffusion of oil through the wick the liquid state of oil capillary action phenomenon volatility of oil the diffusion of oil through the wick the liquid state of oil ANSWER DOWNLOAD EXAMIANS APP
Physics Surface tension in a liquid is due to : Electrical force between molecules. Gravitational force between molecules Adhesive force betweenmolecules Cohesive force between molecules Electrical force between molecules. Gravitational force between molecules Adhesive force betweenmolecules Cohesive force between molecules ANSWER DOWNLOAD EXAMIANS APP
Physics Convex mirror is generally used in ________ Rear view mirror Opthalmoscope Reflector for head light Solar cookers Rear view mirror Opthalmoscope Reflector for head light Solar cookers ANSWER DOWNLOAD EXAMIANS APP
Physics Suitable impurities are added to a semiconductor depending on its use. This is done in order to increase its electrical conductivity enable it to withstand higher voltages increase its life increase its electrical resistivity increase its electrical conductivity enable it to withstand higher voltages increase its life increase its electrical resistivity 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 Contracts It expands or contracts according to its diameter It expands or contracts according to its coefficient of expansion Expands Contracts It expands or contracts according to its diameter ANSWER DOWNLOAD EXAMIANS APP
Physics Radiocarbon is produced in the atmosphere as a result of Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere. Lightning discharge in atmosphere. Collision between fast neutrons and nitrogen nuclei present in the atmosphere. Action of ultraviolet light from the sun on atmospheric oxygen. Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere. Lightning discharge in atmosphere. Collision between fast neutrons and nitrogen nuclei present in the atmosphere. Action of ultraviolet light from the sun on atmospheric oxygen. ANSWER DOWNLOAD EXAMIANS APP
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