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21-3 EMF Induced in a Moving Conductor

21-3 EMF Induced in a Moving Conductor. See diagram 21-9 p 627

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21-3 EMF Induced in a Moving Conductor

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  1. 21-3 EMF Induced in a Moving Conductor See diagram 21-9 p 627 If a uniform B is coming out of the page, and a U-shaped conductor is in the plane of the page, with a movable rod resting on it….it travels a distance Dx=vDt it a time t so that the area of the ‘loop’ increases at an amount DA=lDx =lvDt …then there is an emf produced … e= fB /Dt = BDA/Dt =BlvDt /Dt =Blv …this is valid for the perpendicular components of B, l, and v See Example 21-4 page 628

  2. 21-4 Changing Magnetic Flux Produces an Electric Field • E=F/q= qvB/q=vB • A changing magnetic flux produces an electric field. • This applies to wires and conductors, but also to space where there is a changing magnetic field • See Example 21-5 p 628

  3. HOMEWORK • P 652 q 1-4 AND pr#1-2 due Friday BOP

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