A magnetic field of `100 G (1 G=10^(-4) T)` is required which is unifrom in a region of ilinear 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.