1. Magnetism
&
Electricity

2. Def: The relationship between electricity and magnetism
Electromagnetism
Def: The relationship between electricity and magnetism
An electric current will be produced in a wire that is exposed to a changing magnetic field

3. Electromagnetism Parts of an electromagnet Soft iron core
Wire wrapped in coils

4. Electromagnetic Induction
The current is induced (caused to flow) in a wire when it cuts across magnetic lines of force
Can occur two ways:
Move the iron core in and out of a coil of wire

5. Electromagnetism
Attach coils to a voltage source and leave core inside coils

6. Electromagnetism
A wire wound into a coil has a much stronger magnetic field than a straight wire
Two ways to increase the strength:
The more turns in the coil, the stronger the field
The more current flowing through the wire, the stronger the field

7. THE END