The figure shows the cross-section of a hollow cylinder of inner radius a = 5.0 cm and outer radius b = 7.0 cm.A uniform current density of 1.0 A/ cm2 flows through the cylinder parallel to its axis.Calculate the magnitude of the magnetic field at a distance of d = 10 cm from the axis of the cylinder.

A) 0.00 T
B) 1.5 × 10-4 T
C) 2.5 × 10-4 T
D) 4.5 × 10-4 T
E) 0.50 × 10-4 T
Correct Answer:
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