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Induction in moving conductors Derivation Whiteboards

Induction in moving conductors Derivation Whiteboards. Faraday’s Law:.  = Bvl B = mag field in T v = velocity of conductor in m/s l = length of conductor in m show direction with x product.  = - N  t  = BAcos Derive.

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Induction in moving conductors Derivation Whiteboards

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  1. Induction in moving conductors • Derivation • Whiteboards

  2. Faraday’s Law: •  = Bvl • B = mag field in T • v = velocity of conductor in m/s • l = length of conductor in m • show direction with x product •  = -N  • t •  = BAcos • Derive x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x v l

  3. Whiteboards - Bvl

  4. The wire moves to the right at 12.5 m/s. What is the EMF generated? Which end of the wire is the + end? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B = 1.7 T 12.5 m/s 50. cm  = Bvl  = (1.7 T)(12.5 m/s)(.50 m) = 10.625 V = 11 V 11 V , Bottom

  5. How long does the wire need to be to generate a potential of 45 V from one end to the other? What end is positive? B = 3.7 x 10-5 T x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x X m 5,680 m/s  = Bvl 45 V= (3.7 x 10-5 T)(5680 m/s)l l = 214.12 m = 210 m 210 m, bottom

  6. The wire has a potential of .215 V, and the right end is positive. What is the magnetic field, and which direction is it? B = ?? 175. cm 2.45 m/s  = Bvl .215 V = B(2.45 m/s)(1.75 m) B = 0.050145773 = .0501 T .0501 T ,into page

  7. Eddy currents magnet approaching conductor Video of Meissner effect http://www.youtube.com/watch?v=c3asSdngzLs Levitation: http://www.youtube.com/watch?feature=player_embedded&v=VyOtIsnG71U Demos – Air Track Two tubes Magnets and Al bar triple beam balance Your brain at CERN Charles pouring LN2

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