A photoemissive cell, generally known as a phototube, uses the principles of the photoelectric effect, the phenomenon whereby light-sensitive... View Article
Mass of the body decreases slightly when it is negatively charged because when a body attains a negative charge, it has excess electrons in it.... View Article
In which case change in entropy is negative? Expansion of gas at a constant temperature Evaporation of water Sublimation of solid to gas 2H(g)... View Article