18) Potential energy of a system comprising of point charges U1. When a charge q is added in the system without disturbing other charges, the potential energy becomes U2. The potential of the point where the charge q is placed in the system is. ( A ) U 2 - U 1 q ( B ) U 1 - U 2 q ( C ) U 1 + U 2 2 q ( D ) U 2 - U 1 2 q Share with your friends Share 12 Sanjay Singh answered this Dear student Let us consider two charges q1 and q2 in the system and the third charge is bought into the system from infinity.U1=14π∈q1q2r1 (r1 is separation between q1 and q2)when charge q3 is bought into the systemU2=14π∈q1q2r1+14π∈q2qr2+14π∈q1qr3U2=U1+q(14π∈q2r2+14π∈q1r3)=U1+q×VV=U2-U1qRegards 6 View Full Answer