Two identical point charges +q are fixed at points X and Y separated by a distance 2a…
PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
Two identical point charges +q are fixed at points X and Y separated by a distance 2a in free space. A third identical charge +q is slowly brought from infinity to the midpoint O of XY. The change in electric potential energy of the system is
(a) kaq2
(b) 4kaq2
(c) 2kaq2
(d) 2a5kq2