A magnetic field of 100 G `(1 G = 10^(-4) T) `is required which is uniform in a region of linear dimension about 10 cm and area of cross-section about `10^(-3) m^2` . The maximum current-carrying capacity of a given coil of wire is 15 A and the number of turns per unit length that can be wound round a core is at most 1000 turns `m^(-1)`. Suggest some appropriate design particulars of a solenoid for the required purpose. Assume the core is not ferromagnetic.

Explanation

Length about 50 cm, radius about 4 cm, number of turns about 400, current about 10 A. These particulars are not unique. Some adjustment with limits is possible.