Physics Copper wires are generally used for electrical power transmission instead of iron wire because : Copper is lighter than iron Copper is a better conductor of electricity than iron Copper is cheaper than iron Copper can take higher power than iron Copper is lighter than iron Copper is a better conductor of electricity than iron Copper is cheaper than iron Copper can take higher power than iron ANSWER DOWNLOAD EXAMIANS APP
Physics A light year is a measure of : Velocity Distance Time Speed Velocity Distance Time Speed ANSWER DOWNLOAD EXAMIANS APP
Physics A piece of wood is held under water. The upthrust on it will be: Less than weight of the wood More than weight of the wood Equal to the weight of the wood Zero Less than weight of the wood More than weight of the wood Equal to the weight of the wood Zero ANSWER DOWNLOAD EXAMIANS APP
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 For photoelectric effect to take place, the metal used as the cathode should have ________ Low work function High melting point Low resistance Low melting point Low work function High melting point Low resistance Low melting point ANSWER DOWNLOAD EXAMIANS APP
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 5R/4 2R R/2 3R/4 5R/4 2R R/2 3R/4 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS