Question

A semi-infinite wire bent to form ${\frac{3}{4}}^{th}$ of a circle. Find electric field at centre.

Answer 1

If the semi infinite wire is bent at form ${\frac{3}{4}}^{th}$ of a circle so it will still be infinite, and if an infinite wire is making just 3/4 of a circle, then the circle should be infinitely large, or in other words its radius should be infinite, in this case, the electric field at the center will be very close to zero.