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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
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