How Come Electric Cars Are Virtually Silent But Electric Drills Are So Noisy?


2 Answers

Stuti Ahuja Profile
Stuti Ahuja answered
An electric drill has universal motor in it. A universal motor is extremely noisy. They are called "universal" because they run either off of AC or DC electric power. This same universal motor is also used in vacuum cleaners, routers and electric drills. The reason these motors produce a great deal of noise is because the brushes rub on the slotted armature. In circulars drills also have the gear train noise.

Electric cars on the other hand, electric cars are partially silent. Comparatively, much more silent as it is powered by an electric engine and not a gasoline engine. The electric motor uses a controller which gets its power from an array of rechargeable batteries that last between 3-4 hours.
Arun Raj Profile
Arun Raj answered
Electric cars are known to create less pollution and are virtually silent compared to a gas-powered vehicle. The reason for the "silence" is because an electric car is powered by an electric motor rather than a gasoline engine. There is a controller present in every electric car. The controller derives its power from a set of rechargeable batteries that last between three and four years. The hoses that are found in a gasoline-powered vehicle are substituted for wires in an electric vehicle. No such mechanism exists in an electric drill. It consists of a series of motors which generate high pitched sounds unwelcome to the ear.

Answer Question