Electricity and Magnetism
This section is currently a collection of resources on applications. Introductions to electricity and magnetism will come later.
| AC Circuits
Introduction to impedance, reactance, phase, phasor representation, resonance, RMS and complex impedance. |
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| Power, RMS and 3-phase AC circuits
Power in AC circuits, relations among peak, RMS and phase, phase and power in 3-phase supplies |
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| Filters
RC filters, gain functions, integrators and differentiators. With sound file samples. |
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| Transformers
Farday's law and the transformer equations. Impedance matching. |
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| Electric motors and generators
DC and AC motors and generators. Universal, induction, stepper, squirrel cage, three phase motors. Linear motors and loudspeakers. |
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| Homopolar motors and generators
Homopolar generators in different configurations. Homopolar motors. |
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| Drift velocity and Ohm's law
Derivation of drift velocity. Ohm's law in intensive and extensive forms. |
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| The electromagnetic spectrum
Names, ranges and applications of the bands from Super Low to gamma. Relation to temperature, entropy and information. |
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The nature of light
Light and colour: wavelengths & spectrum: the speed of light: electromagnetic waves: waves, particles, rays: Young's experiment: Transverse/longitudinal: Quanta and photons. |
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Downloads
The animations used in the above pages are available as zipped downloads in swf format for use by educators and educational designers.
More learning resources are available at http://www.animations.physics.unsw.edu.au
Also see Further educational sites from Joe Wolfe
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