pls help guys
ans is sigma/pi eplsilon
Bro, this method should give the answer.
Firstly, midpoint is given so that there is no electric field along the axis of semi-cylindrical sheet. Now, we take diff. element at theta, and we can find the charge density on it (for this we’ll have to convert charge/area into charge/length which is standard). Now, electric field due to infinite wire gives E. We can take it’s components Ex and Ey, and then integrate. Integration of Ex from 0 to pi will be zero.
Integrating Ey will give the answer.