Physics Radiocarbon is produced in the atmosphere as a result of Action of ultraviolet light from the sun on atmospheric oxygen. Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere. Collision between fast neutrons and nitrogen nuclei present in the atmosphere. Lightning discharge in 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. Collision between fast neutrons and nitrogen nuclei present in the atmosphere. Lightning discharge in atmosphere. ANSWER DOWNLOAD EXAMIANS APP
Physics When hot-water is sprinkled on a hotter glass tumbler, it breaks because Water evaporates Glass suddenly contracts Glass reacts chemically with water Glass suddenly expands Water evaporates Glass suddenly contracts Glass reacts chemically with water Glass suddenly expands ANSWER DOWNLOAD EXAMIANS APP
Physics A thin oil film on a water surface appears coloured because of Reflection Polarization Diffraction Interference Reflection Polarization Diffraction Interference ANSWER DOWNLOAD EXAMIANS APP
Physics In a refrigerator, the cooling system should always be At the top Can be anywhere At the bottom At the middle At the top Can be anywhere At the bottom At the middle ANSWER DOWNLOAD EXAMIANS APP
Physics The characteristic invalid for heat radiation is that it travels : Heating the medium through which it passes In a straight line With the speed of light In all directions Heating the medium through which it passes In a straight line With the speed of light In all directions ANSWER DOWNLOAD EXAMIANS APP
Physics Dynamo is a device for converting Chemical energy into electrical energy Magnetic energy into electrical energy Heat energy into electrical energy Mechanical energy into electrical energy Chemical energy into electrical energy Magnetic energy into electrical energy Heat energy into electrical energy Mechanical energy into electrical energy ANSWER DOWNLOAD EXAMIANS APP