A thin glass rod is bent into a semicircle of radius r. A charge +Q is uniformly distributed
Channel: Doubtnut
Date: 2020-07-26

A thin glass rod is bent into a semicircle of radius r. A charge +Q is uniformly distributed along the lower half, as shown in fig. The electric field E at P, the center of the semicircle, is   img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/BMS_V03_C01_E01_116_Q01.png" width="80%"