Physics Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes 2R 3R/4 R/2 5R/4 2R 3R/4 R/2 5R/4 ANSWER DOWNLOAD EXAMIANS APP
Physics On the Kelvin scale, the melting point of ice is 0 K 373K 100K 273K 0 K 373K 100K 273K ANSWER DOWNLOAD EXAMIANS APP
Physics Certain substances loose their electrical resistance completely at super low temperature. Such substances are called. Semi conductors Superconductors Dielectrics Perfect conductors Semi conductors Superconductors Dielectrics Perfect conductors ANSWER DOWNLOAD EXAMIANS APP
Physics The purpose of choke in a fluorescent lamp is : Ro decrease the voltage momentarily To increase the current flow To decrease the resistance To decrease the current flow Ro decrease the voltage momentarily To increase the current flow To decrease the resistance To decrease the current flow ANSWER DOWNLOAD EXAMIANS APP
Physics When an electric bulb breaks, there is an explosive sound. That is due to None of these The chemical reaction between the gases inside the bulb The air outside rushing in to fill the vacuum inside the bulb The compressed gases inside rushing out suddenly None of these The chemical reaction between the gases inside the bulb The air outside rushing in to fill the vacuum inside the bulb The compressed gases inside rushing out suddenly ANSWER DOWNLOAD EXAMIANS APP
Physics Light beam which is highly directional is called: Maser Laser Grazer Eraser Maser Laser Grazer Eraser ANSWER DOWNLOAD EXAMIANS APP
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