Physics Certain substances loose their electrical resistance completely at super low temperature. Such substances are called. Dielectrics Superconductors Perfect conductors Semi conductors Dielectrics Superconductors Perfect conductors Semi conductors ANSWER DOWNLOAD EXAMIANS APP
Physics The purpose of choke in a fluorescent lamp is : To decrease the current flow To increase the current flow Ro decrease the voltage momentarily To decrease the resistance To decrease the current flow To increase the current flow Ro decrease the voltage momentarily To decrease the resistance 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 Air layer between two shirts behaves like insulating media No radiation of heat takes place Air layer between two shirts works as good conductor Two thin shirts become thicker so prevent transmission of heat Air layer between two shirts behaves like insulating media No radiation of heat takes place Air layer between two shirts works as good conductor ANSWER DOWNLOAD EXAMIANS APP
Physics Materials that allow electricity to flow are called Stimulators Electron flows Insulators Conductors Stimulators Electron flows Insulators Conductors ANSWER DOWNLOAD EXAMIANS APP
Physics In which one of the following the phenomenon of total internal reflection of light is used ? Formation of mirage Formation of rainbow Working of binoculars Twinkling of stars Formation of mirage Formation of rainbow Working of binoculars Twinkling of stars ANSWER DOWNLOAD EXAMIANS APP
Physics Materials for rain-proof coats and tents owe their water-proof properties to surface tension viscosity specific gravity elasticity surface tension viscosity specific gravity elasticity ANSWER DOWNLOAD EXAMIANS APP
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