A Particle with a Charge of 5

Multiple Choice

A particle with a charge of 5.5 *10^-8C charge is fixed at the origin.A particle with a charge of-2.3 * 10^-8C charge is moved from x = 3.5 cm on the x axis to y = 3.5 cm on the y axis.The change in the potential energy of the two-charge system is:

A) 3.2 * 10^-4 J
B) -3.2 *10^-4 J
C) 9.3* 10^-3 J
D) -9.3 *10^-3 J
E) 0 J