A point charge of q coulombs is located Please help with qu

A point charge of Q coulombs is located at x = 1, y = 1 in the space between the 60degree conducting wedge. Find the location and sign of all the image charges the potential at the point x = 2, y = 1?

Solution

Here we have three image charges

1] -Q (-1,1)

2] -Q (1,-1)

3] -Q (-1,-1)

Potential at the point (x,y)=(2,1) is

V= KQ/r

r= [ x²+y²]^1/2= 2.24m

Potential at the point (x,y)=(2,1) is ; V= KQ/2.24= 9*10⁹* Q/2.24= 4.02*10⁹ Q volt