Answer to Question 6

 

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A pair of Helmholtz coils has a total of 500 turns and is carrying a current of 2.5 A.  The radius is 7.5 cm and the two coils are 7.5 cm apart.  Calculate the magnetic flux density.

Formula:

B = (0.8)1.5 (4p 10-7 H m-1 500 2.5) 7.5 10-2 m    

 

B =  0.015 T = 15 mT