Electromagnetism How can you make an electromagnet? How can you make the electromagnet

stronger/weaker?

Ways to strengthen a magnetic field Using a solenoid Using a electromagnet

Solenoid A coil of wire that produces a magnetic

field when carrying an electric current

Solenoid What are two ways could you increase a

solenoids’ magnetic field?

Solenoid To increase the strength of the magnetic

field, increase the number of loops per meter AND/OR increase the current in the wire

Electromagnet Made up of a solenoid wrapped around

an iron core The magnetic field of the solenoid

makes the domains inside the iron core line up

The magnetic field in the electromagnet is the field of the solenoid plus the field of the magnetized core

Very useful…can be turned on and off