Electric Potential Ranking Task

[electricman]

In the figure (se attached) there are two point charges, +q and -q . There are also six positions, labeled A through F, at various distances from the two point charges.

Rank the locations A to F on the basis of the electric potential at each point. Rank positive electric potentials as larger than negative electric potentials (left to right).

Anyone who knows?

 

[Doc Al]

What have you done so far? (You must show your work to get help.)

 

[electricman]

Well, i know that C and D have the same electric potential (because of their position to +q and -q). And B have greater potential than A, and i guess that E have greater than F.

I guess this is right because of 1/r.

If not maybe someone can explain it for me.

 

[Doc Al]

Well, i know that C and D have the same electric potential (because of their position to +q and -q).

Good. What does the potential equal at those points?

And B have greater potential than A, and i guess that E have greater than F.

Don't guess, figure it out. (The potentials at E and F are both negative; which is greater?) How does the potential at A & B compare with the potential at E & F?

(You're doing good.)

 

[electricman]

Hmm, well F should be greater, so the answere should be: B A C/D F E, or?

 

[Doc Al]

Looks good to me!

 

[electricman]

Excellent, thanks for your help :)