Electric toothbrush
device · 1954 · Digital age
A toothbrush with a small motor.
What it is made of
- Electric motor — has part. A small motor.
Principles and materials it uses
- Electromagnetic induction — uses. Wireless charging by induction.
- Plastic — is made of. The case is plastic.
- Nylon — is made of. The bristles are nylon.
History: what it evolved from and what it influenced
- Toothbrush — evolved from. A motorized toothbrush.