Physics When a ring of metal is heated what happens to its hole ? Contracts Expands It expands or contracts according to its coefficient of expansion It expands or contracts according to its diameter Contracts Expands It expands or contracts according to its coefficient of expansion It expands or contracts according to its diameter ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following is a good conductor of heat but a bad conductor of electricity ? Rubber Asbestos Celluloid Mica Rubber Asbestos Celluloid Mica ANSWER DOWNLOAD EXAMIANS APP
Physics In which one of the following the phenomenon of total internal reflection of light is used ? Formation of mirage Twinkling of stars Formation of rainbow Working of binoculars Formation of mirage Twinkling of stars Formation of rainbow Working of binoculars ANSWER DOWNLOAD EXAMIANS APP
Physics Suitable impurities are added to a semiconductor depending on its use. This is done in order to 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 increase its electrical conductivity ANSWER DOWNLOAD EXAMIANS APP
Physics The velocity of sound in moist air is more than in dry air because the moist air has Less pressure than dry air. More density than dry air. Less density than dry air. More pressure than dry air. Less pressure than dry air. More density than dry air. Less density than dry air. More pressure than dry air. ANSWER DOWNLOAD EXAMIANS APP
Physics Sending a frame to a group of stations is known as Casting Spreading Single casting Multicasting Casting Spreading Single casting Multicasting ANSWER DOWNLOAD EXAMIANS APP
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