This program introduces the motor principle by using the analogy of a futuristic magnetic rail gun. It also shows current flowing through a simple loop of wire within a magnetic field, causing the loop to rotate partially; with the addition of a split-ring commutator, continuous rotation is achieved. (10 minutes)

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Part of the Series : Electromagnetism

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		Energy from the Nucleus This program examines the process of radioactive decay, and how Einstein's special theory of relativity applies. The conversion of mass to energy is re-created in various simulations, such as nuclear fission and nuclear fusion. (10 minutes)(more details)		VHS $49.95 DVD $49.95
		Potential Difference Additional concepts needed for the complete description of an electrical circuit-such as potential difference-are introduced in this program. The analogy of a ski lift and skiers is used to demonstrate changes in electrical potential energy. Finally,...(more details)		VHS $49.95 DVD $49.95
		Electromagnetic Induction In 1830, Michael Faraday discovered the principle of electromagnetic induction. This principle is demonstrated along with Lenz's law, the principle that the induced magnetic field always opposes the changing external magnetic field. (10 minutes)(more details)		VHS $49.95 DVD $49.95
		Magnetism and Electron Flow This program introduces the left-hand rule for predicting the relationship between the direction of the magnetic field and the direction of flow in a conductor, and demonstrates the extended magnetic field surrounding a helix. (10 minutes)(more details)		VHS $49.95 DVD $49.95
		Domain Theory This program examines the electromagnet and illustrates the relative conductivity of various metals at the atomic level. The left-hand rule for coils is introduced, and the way that atoms of materials such as iron and steel arrange themselves in doma...(more details)		VHS $49.95 DVD $49.95 DVD + 3-Year Streaming $74.93 3-Year Streaming $49.95

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