Electric Fields and Point Charges

[PrideofPhilly]

Homework Statement

Suppose you want to determine the electric field in a certain region of space. You have a small object of known charge, and in an instrument that measures magnitude and direction of the force exerted by object by the field.

(a) The object has a charge of +20.0 C, and the electric force exerted on it is 40.0 N due east. What are the magnitude and direction of the electric field?

(b) What are the magnitude and direction if it has a charge of -10.0 C and the force 20.0 N due west?

Homework Equations

E = F/q0

The Attempt at a Solution

(a) E = 40.0 N/20.0 C = 2.00 N/C due east

(b) E = -20.0 N/-10.0 C = 2.00 N/C due east

Are these the right magnitudes and directions?

 

[jgens]

Looks pretty good to me.