The Exploratorium
Science Snacks
Snacks about Magnetism

 

Snack name

Description

Circles of Magnetism I

You can make a magnetic field that's stronger than the earth's!

Circles of Magnetism IV

Two parallel, current-carrying wires exert forces on each other.

Curie Point

When a piece of iron gets too hot, it is no longer attracted to a magnet.

Diamagnetism

A grape is repelled by both the north and south poles of a strong rare-earth magnet. The grape is repelled because it contains water, which is diamagnetic. Diamagnetic materials are repelled by magnetic poles.

Eddy Currents

A magnet falls more slowly through a metallic tube than it does through a nonmetallic tube.

Magnetic Lines of Force

Iron filings will trace out the lines of a magnetic field in three dimensions.

Magnetic Pendulums

Copper coils become electromagnetic swings.

Magnetic Shielding

Explore magnetic shielding, lines of force and the concept of permeabllity with low cost material.

Magnetic Suction

This experiment shows how your doorbell works.

Motor Effect

A magnet exerts a force on a current-carrying wire.

Strange Attractor

The attraction and repulsion of magnets produces entrancing, unpredictable motion.

Stripped Down Motor

As motors go, this is about as simple as it gets.