# Determining Work Based on a Charge and Particle

## Homework Statement

The potential at a point is -4.5E3 V. How much work, in J, is done to bring a 0.94 C charge from infinity to the point?

1V = 1 J/C

## The Attempt at a Solution

Well I know that 1 V = 1 J/C so I did -4500V*0.94C = -4230J but I wasn't sure if this was right.

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gneill
Mentor

## Homework Statement

The potential at a point is -4.5E3 V. How much work, in J, is done to bring a 0.94 C charge from infinity to the point?

1V = 1 J/C

## The Attempt at a Solution

Well I know that 1 V = 1 J/C so I did -4500V/0.94C = -4230J but I wasn't sure if this was right.
Check how the units multiply out in your calculation. Do you get Joules?

Check how the units multiply out in your calculation. Do you get Joules?
Ah my bad, that was a typo, what I did was -4500V*0.94C. Which does come out to J but I wasn't sure if that gave the proper answer.

gneill
Mentor
Ah my bad, that was a typo, what I did was -4500V*0.94C. Which does come out to J but I wasn't sure if that gave the proper answer.
Alright. In that case the result looks fine Alright. In that case the result looks fine Alright, thanks, I just wasn't sure because my instructor has a tendency of giving us trick problems and that just seemed too easy.