(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Two point charges of magnitude 2nC and -4nC are separated by 35 cm. The Coulomb constant is 8.98755e9 Newtons (Meters squared/ Coulombs squared). What is the potential difference between a point infinitely far away and a point midway between the charges?

R= .175

2. Relevant equations

E = Kc (q/r^2)

Magnitude of electric field = Coulomb's Constant (value of the charge/ Distance squared)

Delta V = Kc (q/r)

Potential difference = Coulomb's Constant (value of the point charge)/ (distance to the point charge)

3. The attempt at a solution

I tried running the two separate charges into the first formula (E1= 587, E2= -1174), then added them together, then ran the second formula with the difference of the first two (1761) and ended up with (9.04e13).

Call me crazy, but isn't that quite a bit of voltage for such a tiny amount of charges? Where am I going wrong?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Finding a point midway between two electric charges

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**