Magnetic Flux

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  • Units of magnetic flux are Weber (Wb)

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Magnetic Flux Through Closed Surfaces

  • Normal to closed surfaces point from the inside to the outside



Gauss's Law for Magnetism

  • The total magnetic flux through any closed surface is zero

  • This would not be true if magnetic monopoles were found to exist

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Example 1: Flux through a Circular Loop


  • Calculate the flux of 3-Tesla uniform magnetic field through the circular loop of radius 0.2 meters with three turns of wire

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Example 2: Flux Due to a Wire


  • A long straight wire carries a current I as shown.

  • Calculate the magnetic flux through the loop

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