Magnets and electromagnets both produce magnetic fields and can attract or repel other magnetic materials. Magnets have a permanent magnetic field, while electromagnets only produce magnetic fields when electricity is running through their coils. The strength of an electromagnet's magnetic field can be increased by using more voltage, coils, or adding an iron core, and reversing the current reverses the poles. Common examples of electromagnets include speakers, relay switches, and electric bells.
5. ElectromagnetsElectromagnets
The strength of an electromagnet can be increased by:
1) Increasing the voltage
2) Increasing the number of coils
3) Inserting an iron core
(The poles can be reversed if you
reverse the direction of the current)
