Determining Work Based on a Charge and Particle

  • Thread starter rabiddogma
  • Start date
  • #1

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.
 
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Answers and Replies

  • #2
gneill
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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?
 
  • #3
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.
 
  • #4
gneill
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20,803
2,784
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 :smile:
 
  • #5
Alright. In that case the result looks fine :smile:
Alright, thanks, I just wasn't sure because my instructor has a tendency of giving us trick problems and that just seemed too easy.
 

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