# Homework Help: Electric Potential

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1. Mar 13, 2016

### Philip KP

1. The problem statement, all variables and given/known data
A proton is in a place where the electric potential is V, and as a result it has a potential energy E. If you replace the proton with an alpha particle (twice the charge of the proton and four times the mass) in the same place, it will experience an electric potential

2. Relevant equations
Va=(PEa/q)

3. The attempt at a solution
So this might be short but I have a final exam soon and there are no tutors so I'm just trying to make sure this is how it works.

What I think so far is that since the charge (q) is increasing by factor of 2, the denominator will increase..making the electric potential decrease by 2? I also believe the mass has no part in it since we know the charge is 2q. But thats where I am unsure.

Thanks

2. Mar 14, 2016

### BvU

Mass nor charge detemine V. V is determined by the outside world.

Your term electric potential is confusing. The potential energy is qV, the electrostatic potential is V.