Magnetic Forces and Electrictromagnetism

Magnetic force is strongest at the poles but not limited to the poles

The area of magnetic force around a magnet is known as its magnetic field

Because of magnetic fields, magnets can interact without even touching

Magnetic field lines spread out from one pole, curve around the magnet, and return to the other pole

Magnetic field lines will always leave the north pole and enter the south pole

The closer the lines are, the stronger the field

Magnetic field lines are closest together at the poles

A compass is a device that has a magnet on a needle that spins freely. The needle points north.

Just like a bar magnet, Earth has a magnetic field around it and two magnetic poles.

The poles of a magnetized compass needle align with Earth's magnetic Field

Earth's core is a large sphere of metal at Earth's center

The outer core is made of hot swirling liquid iron

The motion of this iron creates a magnetic field similar to the magnetic field of a bar magnet

The circuit must be closed for electric current to flow

If the circuit is open, the current cannot flow

Increase the amount of current in the wire (battery strength)

Increase your loops in your wire!

The magnetic field around the wire forms a CIRCLE. When you make a loop in a wire, this causes the magnetic field lines to bunch closer together

Magnetic forces increase when magnetic field lines are closer together