Voltage potential due to 2 charges

  • Thread starter bobby3280
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  • #1
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Homework Statement


Find the potential at points a and b in the diagram for charges Q1 = +1.60 nC and Q2 = -1.60 nC.

I know b is 0
physics.gif



Homework Equations



V = kQ/r

The Attempt at a Solution



I tried this using the equation and got

8.99e9 * [( +1.60e-6 / .05) + ( -1.60e-6 / .15 ) ] = 191700 V but this isn't right any suggestions??
 

Answers and Replies

  • #2
Kurdt
Staff Emeritus
Science Advisor
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6

Homework Statement


Find the potential at points a and b in the diagram for charges Q1 = +1.60 nC and Q2 = -1.60 nC.

I know b is 0
physics.gif



Homework Equations



V = kQ/r

The Attempt at a Solution



I tried this using the equation and got

8.99e9 * [( +1.60e-6 / .05) + ( -1.60e-6 / .15 ) ] = 191700 V but this isn't right any suggestions??
If its nancoulombs as the question suggests then you've just made a numerical error in the solution. Nano = x10-9
 
  • #3
12
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Wow how'd I miss that thanks!
 

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