A charge Q is spread uniformly in the form of a line charge density `lamda=Q/(3a)` on the sides of an 3a equilateral triangle of perimeter 3a. Calculate the potential at the centroid C of the triangle.

Answer

A, B, C, D

Explanation

`dq=lamdadx`
Potential at C, due to charge `dq` is
`dv=(k(dq))/r (:' k=1/(4piepsilon_0)`
`:.` Total potential =`6int_(x=0)^(x=a//2)dV`