What simple machine is a rope or chain wrapped around a grooved wheel is called a what?
They used a loom which is a large usually wooden structure that was a very early version of a sewing machine. The person would sit on a bench and there would be many strings wrapped around the middle. Then they had a wooden piece called a bob or something with a string attached to it and they would pull that through the wrapped strings to cris cross them. Also had a foot pedal to move…
A coil of wire or a coil in the shape of a cylinder is a typical shape for an electromagnet (or a solenoid). The strength of the magnetic field of an electromagnet can be increased significantly if the coil is wrapped around an iron core. This configuration may be called an inductor when used as an element of an electrical circuit.