Question

I’m gonna ask this again because I REALLY need an answer.

Answer 1

Answer:

the answer is what I attached to this

Answer 2

A solenoid is a type of electromagnet, the purpose of which is to generate a controlled magnetic field through a coil wound into a tightly packed helix. The coil can be arranged to produce a uniform magnetic field in a volume of space when an electric current is passed through it.

Solenoid is the generic term for a coil of wire used as an electromagnet. It also refers to any device that converts electrical energy to mechanical energy using a solenoid. ... Common applications of solenoids are to power a switch, like the starter in an automobile, or a valve, such as in a sprinkler system.