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Calculate the magnetic field density in a 25 turn copper coil with radius 7.2 cm


Calculate the magnetic field density in a 25 turn copper coil with radius 7.2 cm if the coil is rotated 90° in the field from full flux to zero flux in a time of 45 msec resulting in an average current of 18 MA. The coil has as total resistance of 0.085Ω.

  • 1.7E-4T 

  • 2.7E-3T 

  • 3.8E-5 T 

  • 4.6E-3 T 

  •  5.8E-5 T

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