lec25

# lec25 - S emf d dt d N dt d N V S B • Stationary loops S...

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Lecture Notes for C-term 2009 Lecture 25 Prof. R. Ludwig Department of Electrical and Computer Engineering Worcester Polytechnic Institute Worcester, MA ECE 2112 Electromagnetic Theory Copyright, 2000 © R. Ludwig

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ECE2112_25 2 Lecture 25 Objectives • What is Faraday’s law? • What is the flux rate of change • How does a time varying fields induce a current in a loop?
ECE2112_25 3 ECE 2112 - Lecture 25 • Faraday’s law in differential form S B S E L E d t d d V C S S tr emf   ) ( t B E Stokes’ theorem Since S is arbitrary:

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ECE2112_25 4 ECE 2112 - Lecture 25 Faraday’s induction law

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Unformatted text preview: S emf d dt d N dt d N V S B • Stationary loops S emf d t N V S B ECE2112_25 5 ECE 2112 -Lecture 25 • Typical example of transformer emf: S tr emf d dt d V S B S emf d dt d V S B 2 1 2 1 ) ( V V R R I V tr emf ECE2112_25 6 ECE 2112 -Lecture 26 • Magnetic force is generated in an external B-field E B u F q q ) ( C C m m emf d d V L B u L E ) ( Motional electric field • Motional emf B...
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lec25 - S emf d dt d N dt d N V S B • Stationary loops S...

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