Answer to Question #200963 in Field Theory for Mallory

Question

 A long solid copper rod has a circular cross section of diameter 15.76 cm. The rod carries a current of 6.41 A, uniformly distributed across it's cross section.  Calculate the magnetic field strength: (a) at the centre (b) 3.94 cm from the centre (c) 7.88 cm from the centre, and (d) 11.82 cm from the centre.

Answer 1

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