Why Capacitors used with D.C Motor?

Dc motor control is very easy.you can easily control any dc moto r using L293D chip.But if you look at exact circuit of that motor driver you seen that some capacitors are used.but some times beginners doesn't know the purpose of that capacitors are used with motor driver.Here i'm going to explain what i learnt about dc motor driver from internet. T his must be the case of a DC motor otherwise the capacitor would act as a partial short circuit, (never plug a capacitor into an electrical outlet!). The typical small DC motor consists of coils and brushes and permanent magnets. (Called a PM DC motor.) The current through the coils pushes therm from one magnet to the other and this turns the commutator which switches the current around to continue this process in a cycle. Since you are switching the coils on and off the current drain on the battery jumps up and down. When it is high it will waste energy heating the battery due to internal resistance. The capacitor acts...