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Teach Yourself Electricity and Electronics, Sixth Edition, 6th Edition by Simon Monk, Stan Gibilisco

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17

CHAPTER

Alternating-Current Power and Resonance

WHEN WE WANT TO OPTIMIZE HOW POWERTRAVELS,” 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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