What are the 4 variables affects the strength of an electromagnet?

Four factors that affect the strength of an electromagnet are:

1. The type of material that makes up the core of the electromagnet. This core is called the solenoid. Common materials that make up the core are iron, aluminum, copper, and steel.

2. The size of the solenoid affects the strength of an electromagnet. The larger the core, the stronger the electromagnet.

3. A metal wire is twisted around the solenoid. The number of times the wire is twisted around the solenoid affects the strength of the electromagnet. The more twists of the wire, the stronger the electromagnet.

4. The strength of the current that passes through the solenoid also affects the strength of an electromagnet. The greater the current, the stronger the electromagnet.