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equation of continuity

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Presentation on theme: "equation of continuity"— Presentation transcript:

1 equation of continuity
Maxwell's equations Poynting's theorem

2 Faraday’s law apply Stoke’s theorem

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5 Gauss's theorem

6 equation of continuity

7 place some charges on a conductor. How long does it take for
example: place some charges on a conductor. How long does it take for the charges to spread out?

8 metal has a conductivity Ohm's law

9 Poisson's equation solution time constant

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11 static field left hand side right hand side

12 left hand side right hand side

13 I

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15 Maxwell’s equations

16 Big Muskie

17 Relative size

18 Relative size

19 Relative size

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21 Integral form of Maxwell’s equations

22 constitutive relations
D = E B = H j = E

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24 Poynting’s theorem

25 Poynting’s theorem E x H em power that leaves
= - (stored em energy) / t - lost em power E x H

26 Spherical radiation E x H • ds = EH 42  E2 42  constant E  1/

27 Cylindrical radiation
E x H • ds = EH 2r L  E2 2r L  constant E  1/(r)1/2 r L

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