Physics What is the principle of a ''Life Jacket"? It increases the volume of the person to keep him afloat The person can sit on it like a raft It provides oxygen to a drowning person It decreases the volume of the person to keep him afloat It increases the volume of the person to keep him afloat The person can sit on it like a raft It provides oxygen to a drowning person It decreases the volume of the person to keep him afloat ANSWER DOWNLOAD EXAMIANS APP
Physics A thin oil film on a water surface appears coloured because of Interference Polarization Reflection Diffraction Interference Polarization Reflection Diffraction ANSWER DOWNLOAD EXAMIANS APP
Physics Instrument for measuring blueness of the sky or ocean is called ________ Cyanometer Ceraunograph Barometer Bathymeter Cyanometer Ceraunograph Barometer Bathymeter ANSWER DOWNLOAD EXAMIANS APP
Physics Rectifiers are used to convert: Alternating current to Direct current High voltage to low voltage Direct current to Alternating current Low voltage to high voltage Alternating current to Direct current High voltage to low voltage Direct current to Alternating current Low voltage to high voltage ANSWER DOWNLOAD EXAMIANS APP
Physics The wall of a dam is made thicker at the bottom than at the top because the pressure exerted by the water on the wall Depends on the area of the wall Depends on the thickness of the wall Increases with height of the wall Increases with depth of the wall Depends on the area of the wall Depends on the thickness of the wall Increases with height of the wall Increases with depth of the wall ANSWER DOWNLOAD EXAMIANS APP
Physics Why two thin shirts can keep us warmer than a single thick shirt in winter ? Two thin shirts become thicker so prevent transmission of heat No radiation of heat takes place Air layer between two shirts behaves like insulating media Air layer between two shirts works as good conductor Two thin shirts become thicker so prevent transmission of heat No radiation of heat takes place Air layer between two shirts behaves like insulating media Air layer between two shirts works as good conductor ANSWER DOWNLOAD EXAMIANS APP
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