notes2 2317

# notes2 2317 - Prof David R Jackson ECE Dept Spring 2011...

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Unformatted text preview: Prof. David R. Jackson ECE Dept. Spring 2011 Notes 2 ECE 2317 ECE 2317 Applied Electricity and Magnetism Applied Electricity and Magnetism Notes prepared by the EM Group University of Houston Definition: No time variation. In terms of frequency, f = 0 [Hz] The electromagnetic field splits into two independent parts: Electrostatics: ( q , E ) charges produce electric field Magnetostatics: ( I , B ) current produces magnetic field The static approximation is usually accurate for d << λ ( d is the dimension of the circuit or device). Statics Statics Example: f = 60 [Hz] λ = c / f Clearly, most circuits fall into the static-approximation category at 60 [Hz]! c = 2.99792458 × 10 8 [ m/s ] f = 60 [ Hz ] This gives: λ = 4.9965 × 10 6 [m] = 4,996.5 [km] = 3,097.8 [miles] Statics (cont.) Statics (cont.) The following are special cases of electromagnetics at low frequency: circuit theory (e.g, ECE 2300) electronics power engineering magnetics (design of motors, generators, transformers, etc.)magnetics (design of motors, generators, transformers, etc....
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notes2 2317 - Prof David R Jackson ECE Dept Spring 2011...

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