A charge q is at the origin a charge -2q is at x 850 m on

Question

A charge +q is at the origin. A charge -2q is at x = 8.50 m on the +x axis.

(a) For what finite value of x is the electric field zero?

m

(b) For what finite values of x is the electric potential zero? (Note: Assume a reference level of potential V = 0 at r = ?.)

Smallest value of x:

m

Largest value of x:

m