A uniform wire of resistance per unit length `lambda` is bent into  semicircle of radius `a`.
Channel: Doubtnut
Date: 2020-07-12

A uniform wire of resistance per unit length `lambda` is bent into  semicircle of radius `a`. The wire rotates with angular velocity `omega` in a vertical plane about a orizontal is passing through `C`. A uniform magnetic field `B` exists in space in a direction perpendicular to paper inwards.  a. Calculate potential difference between points `A` and `D`. which point is at higher potential?  b. If points `A` and `D` are connected by a conducting wire of zero resistance, find the potential difference between `A` and `C`.