Eduprobe
Question:
Three charges, each +q, are placed at the corners of an isosceles triangle ABC of sides BC and AC, 2a. D and E are the mid points of BC and CA. The work done in taking a charge Q from D to E is:
eqQ8πϵ₀a
zero
3qQ4πϵ₀a
qQ4πϵ₀a
Solution:
AC = BC
VD = VE
W = Q(VE - VD)
W = 0