This activity from the Exploratorium demonstrates the magnetic field produced by a current-carrying wire. A group of compasses are arranged around the wire to indicate the direction of the field (including Earth's field). The site provides an explanation of the physics that occurs and a description of the right-hand rule. This activity is part of Exploratorium's Science Snacks series.
6-8: 4G/M3. Electric currents and magnets can exert a force on each other.
AAAS Benchmark Alignments (1993 Version)
4. THE PHYSICAL SETTING
4F (9-12) #3. Accelerating electric charges produce electromagnetic waves around them. A great variety of radiations are electromagnetic waves: radio waves, microwaves, radiant heat, visible light, ultraviolet radiation, x rays, and gamma rays. These wavelengths vary from radio waves, the longest, to gamma rays, the shortest. In empty space, all electromagnetic waves move at the same speed?the "speed of light."
G. Forces of Nature
4G (9-12) #5. Magnetic forces are very closely related to electric forces and can be thought of as different aspects of a single electromagnetic force. Moving electric charges produce magnetic forces and moving magnets produce electric forces. The interplay of electric and magnetic forces is the basis for electric motors, generators, and many other modern technologies, including the production of electromagnetic waves.
Exploratorium. Exploratorium: Snacks About Magnetism - Circles of Magnetism I. San Francisco: Exploratorium, September 14, 2007. http://www.exploratorium.edu/snacks/circles_magnetism_I/ (accessed 28 May 2015).
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