A pair of parallel conducting plates have potentials of -17 V and 55 V, respectively. How much work needs to be done on an electron in order to move it from the 55 V to the -17 V plate?
A. 1.2 x 10-17 J
B. -6.1 x 10-18 J
C. -1.2 x 10-17 J
D. 6.1 x 10-18 J