Question

The turns of a solenoid, designed to provide a given magnetic flux density along its axis, are wound to fill the space between two concentric cylinders of fixed radii. How should the diameter d of the wire used be chosen so as to minimize the heat dissipated in the windings?

• A. Wire should be multiple of 5d
• B. Wire should be multiple of $\frac d3$
• C. Wire is independent of d
• D. Can't say

Answer 1

Answer: (C)

Wire is independent of d

Answer 2

The correct option is (C): Wire is independent of d.