Determining Work Based on a Charge and Particle

[rabiddogma]

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?

Homework Equations

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.

 

[gneill]

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?

Homework Equations

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?

 

[rabiddogma]

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]

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

 

[rabiddogma]

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.