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CHAPTER
Alternating-Current Power and Resonance
WHEN WE WANT TO OPTIMIZE HOW POWER “TRAVELS,” OR CHANGES FORM, WE FACE A CHALLENGE. A phenomenon called resonance can play an important role in efficient power transfer and conversion, especially at high AC frequencies.
Forms of Power
Scientists and engineers define power as the rate at which energy is expended, radiated, or dissipated. This definition applies to mechanical motion, chemical effects, electricity, sound waves, radio waves, heat, infrared (IR), visible light, ultraviolet (UV), X rays, gamma rays, and high-speed subatomic particles.
Units of Power
The standard unit of power is the watt, abbreviated W and equivalent to a joule per second (J/s). Sometimes, engineers specify power in ...
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