Two point charges are arranged along the xaxis as shown in t

Two point charges are arranged along the x-axis as shown in the figure below.

a) Where (between the two charges) is the electric potential equal to zero?

b) Find the electric potential energy stored in this arrangement of two charges.

c) A positively charged particle is placed 0.2 cm to the left of the -5uc charge, along the x-axis. The net force acting on the positively charged particle is orieneted.

1. to the right

2. to the left

3. zero

Solution

1. Ellectric potential can never be zero between the two charges since one charge is postivie and other is negative. so in between these two charge would not be zero as both electric potetnial would add up.

2. Ptential energy would be = KQ1Q2/r = 9*10^9 * 2*10^-6 * 5 *10^-6/.8 = .1125 J

3.It would be towards right since q1 will repel and q2 would attract.