Question

Two particles are fixed to an x axis: particle 1 of charge -1.00 x 10-7 C is at the origin and particle 2 of charge +1.00 x 10-7 C is at x = 17.1 cm. Midway between the particles, what is the magnitude of the net electric field?

Answer 1

Apply Coulomb's law.

E is towards the negative charge. Field due both charges is the same.

E = 2 * 9 * ^9 * 1 * 10^-7 ÷ 0.08505^2. Newton/Coul .
Answer 248842 V/m