A small segment of length a is cut along z-axis from a infinite sheet having a surface current density J (current per unit width). The magnetic field at P is :-

Question

G1 Physics · Accepted Answer

Treat the missing segment as superposition: field of the complete infinite current sheet is μ₀J/2, and subtract the field of the removed strip of width a. Integrating the strip contribution at height h gives B⃗=(μ₀J/2)[a/(πh)-1]î. Hence C.