A wire of radius 0.6 cm carries a current of 10 A that is uniformly distributed over its cross section.Calculate the magnetic field strength at r = 0.2 cm divided by that at r = 0.4 cm.
A)1.0
B)0.75
C)0.50
D)2.0
E)3.0

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The Answer of A wire of radius 0.6 cm carries a current of 10 A that is uniformly distributed over its cross section.Calculate the magnetic field strength at r = 0.2 cm divided by that at r = 0.4 cm.
A)1.0
B)0.75
C)0.50
D)2.0
E)3.0

A Wire of Radius 0