Physics What is the minimum distance (in metres) required to hear an echo? 21 17 10 13 21 17 10 13 ANSWER DOWNLOAD EXAMIANS APP
Physics Heat from the Sun reaches the Earth by Conduction Reflection Convection Radiation Conduction Reflection Convection Radiation ANSWER DOWNLOAD EXAMIANS APP
Physics An electron microscope gives higher magnification than an optical microscope, because : The velocity of electron is smaller than that of visible light The wavelength of electrons is smaller as compared to the wavelength of visible light It uses more powerful lenses The electrons have more energy than the light particles The velocity of electron is smaller than that of visible light The wavelength of electrons is smaller as compared to the wavelength of visible light It uses more powerful lenses The electrons have more energy than the light particles ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following celestial bodies contains abundant quantities of helium-3, a potential source of energy ? Earth Moon Saturn Venus Earth Moon Saturn Venus 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 Radiocarbon is produced in the atmosphere as a result of 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. Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere. ANSWER DOWNLOAD EXAMIANS APP
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