Answer to Question #249176 in Electricity and Magnetism for Israel

Question

- a charge +Q at a distance 2d from a charge -Q and a point X at a distance d from -Q what is the field strength at X numerically using SI units.

Answer 1

$$E=k\frac{Q}{d^2}-k\frac{Q}{d^2}=0\frac{V}{m}$$