Magnetism and Electromagnetism

Front

Permanent magnets have two

Back

magnetic poles

Front

Like poles on a magnet

Back

repel each other

Front

Magnetic field lines around a bar magnet

Back

Spread out from one pole and curve to the other

Front

Changing poles on Earth

Back

Magnetic poles

Front

Difference between Earth's magnetic and geographic poles

Back

Magnetic declination

Front

Magnetic declination changes as Earth's magnetic poles move

Back

It will change

Front

Electric current through wires produces:

Back

magnetic field

Front

Ways to increase magnetic field strength

Back

Decreasing the number of loops

Front

Materials for electromagnet

Back

battery, coil of wire, iron core

Front

Moving a magnet through a coil

Back

Current generated in the wire