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.
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.