NNSE508_EM-L3-magnetic-2

NNSE508_EM-L3-magnetic-2 - 1 Lecture contents Magnetic...

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NSE 508 EM Lecture #3 1 Lecture contents Magnetic field-2 Magnetization Faraday’s law
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NSE 508 EM Lecture #3 2 Differential form of Ampere’s Law 0 0 C S encl S B dl B ds I J ds  Applying Stokes’s theorem to Ampere’s Law Because the above must hold for any surface S , we must have 0 B J  Differential form of Ampere’s Law
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NSE 508 EM Lecture #3 3 Divergence of B -Field The B-field is solenoidal , i.e. the divergence of the B- field is identically equal to zero: From gauss theorem field lines are closed. Physically, this means that magnetic charges (monopoles) do not exist. A magnetic charge can be viewed as an isolated magnetic pole. 0 B  V S divAdV A n ds  
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