| Directions : (21-25) |
| Magnetic field due to a Hollow Wire |
| The field of a hollow wire with constant current is homogeneous. |
| Curves in the graph shown give, as ruction of radial distance r, the magnitude B of the magnetic field inside and outside four long wires a, b, c and d carrying currents that are uniformly distributed across the cross sections of the wires. Overlapping portions of the plotsare indicated by double labels. |
 |
A) a
B) b
C) c
D) d
Correct Answer: A
Solution :
It can be seen that slope of curve for wire a is greater than wire c
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