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Eddy Currents Field Direction Rotations

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An aluminium cylinder rotates as it falls through a uniform magnetic field. Let it be falling in the y direction and the field direction be z. When its axis of rotation is perpendicular to the field direction (along the x axis), it slows down. When it is parallel to the field direction there is no braking. Why?

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If a large conductive metallic object is moved through a magnetic field which intersects perpendicularly to it, the magnetic field will induce small "rings" of current which will actually create internal magnetic fields opposing ...

Solution Summary

An aluminium cylinder rotating through a uniform magnetic field is determined. The direction of the field rotation is provided.

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Alternating Current and Direct Current

Discuss alternating current and direct current in following aspects.

(1) How it is created, including descriptions of all components required. Illustrate with labeled diagrams.
(2) A labeled diagram of its waveform.
(3) Magnetic effects.
(4) Typical uses in everyday world.
(5) Typical uses in building services engineering.

Compare alternating and direct current, highlighting the advantages and disadvantages of each.

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