BYC-29 | Electrostatics l Pathfinder l Physics l Olympiad | JEE Advanced

BYC-29 | Electrostatics l Pathfinder l Physics l Olympiad | JEE Advanced
29. Charge distribution on a rod bent as a semicircular arc of radius R follows a function 2 = Ao sin Here iS line charge density at a point on the rod, o is a positive constant and 0is angular position of the point as shown in the figure. Find the ratio of electrostatic potentials at the centre 0 and at a general point on the diameter AB at distance r (r R) from the centre O.