Physics Certain substances loose their electrical resistance completely at super low temperature. Such substances are called. Semi conductors Perfect conductors Superconductors Dielectrics Semi conductors Perfect conductors Superconductors Dielectrics ANSWER DOWNLOAD EXAMIANS APP
Physics When number of turns in a coil is trippled, without any change in the length of coil, its self inductance becomes? Nine times Three times Six times One–third Nine times Three times Six times One–third ANSWER DOWNLOAD EXAMIANS APP
Physics The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be: 8 T 1 T 2 T 4 T 8 T 1 T 2 T 4 T ANSWER DOWNLOAD EXAMIANS APP
Physics In a Laser (say neon laser) all the atoms emit the light waves of Same frequency All of these Same amplitude Same phase Same frequency All of these Same amplitude Same phase ANSWER DOWNLOAD EXAMIANS APP
Physics Light beam which is highly directional is called: Eraser Laser Maser Grazer Eraser Laser Maser Grazer ANSWER DOWNLOAD EXAMIANS APP
Physics Conversion of sound energy into electrical energy is done by Microphone Loudspeaker Solar cell Gramophone Microphone Loudspeaker Solar cell Gramophone ANSWER DOWNLOAD EXAMIANS APP