Physics A small gap is left at the joints of rails in a railway track to Control the speed of train Avoid the heating of tracks to high temperature Keep the rails equidistant Avoid the tracks being distorted due to seasonal temperature variation Control the speed of train Avoid the heating of tracks to high temperature Keep the rails equidistant Avoid the tracks being distorted due to seasonal temperature variation ANSWER DOWNLOAD EXAMIANS APP
Physics The width of depletion layer of a P-N junction Decreases with light doping Is increased under reverse bias Is independent of applied voltage Increases with heavy doping Decreases with light doping Is increased under reverse bias Is independent of applied voltage Increases with heavy doping ANSWER DOWNLOAD EXAMIANS APP
Physics Which one of the following is responsible for the working of Newton's colour disc experiment ? Formation of pure spectra Persistence of vision Formation of impure spectra Principle of complementary colour Formation of pure spectra Persistence of vision Formation of impure spectra Principle of complementary colour ANSWER DOWNLOAD EXAMIANS APP
Physics The impurity atoms with which silicon should be doped to make p-type semiconductors are Phosphorus Antimony Boron Germanium Phosphorus Antimony Boron Germanium ANSWER DOWNLOAD EXAMIANS APP
Physics What is the unit of the physical quantity Entropy? Newton per kelvin Joule per kelvin Watt per kelvin Pascal per kelvin Newton per kelvin Joule per kelvin Watt per kelvin Pascal per kelvin ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following parts of the sunlight makes the solar cooker hot ? Cosmic rays Red light Infra red Ultra violet Cosmic rays Red light Infra red Ultra violet ANSWER DOWNLOAD EXAMIANS APP
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