What Force Does a Uniform Electric Field Exert on Charge q?

[kirby2]

A charge q and a charge 3q are released in a uniform electric field. If the force this field exerts on 3q is F, the force it will exert on q is:

i think the answer is F/3. is this right? i used E=F/q.

 

[berkeman]

A charge q and a charge 3q are released in a uniform electric field. If the force this field exerts on 3q is F, the force it will exert on q is:

i think the answer is F/3. is this right? i used E=F/q.

Correct.