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lec23 - Lecture 23 • Closer look at the meaning of k j jk...

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Lecture Notes for C-term 2009 Lecture 23 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_23 2 Lecture 23 Objectives How is the storage of magnetic energy quantified? What is self-inductance? What is mutual inductance?
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ECE2112_23 3 ECE 2112 - Lecture 23 Definition of inductance k j jk I L Solenoidal coil A d I N N m 2
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ECE2112_23 4 ECE 2112 -
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Unformatted text preview: Lecture 23 • Closer look at the meaning of: k j jk I L • Key: field linkage d S N N I d S I N N I M 1 1 2 1 1 1 1 2 1 2 / / ECE2112_23 5 ECE 2112- Lecture 23 • Key is to find the field linkage ECE2112_23 6 ECE 2112- Lecture 23 HB B w m 2 1 2 1 2 • Energy density 2 2 2 2 1 ) ( 2 1 2 1 LI d a B dv w W V m m • Total stored energy of a solenoid...
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