# Electric potential at center of charged rod

Tags:
1. Aug 22, 2015

### gruba

1. The problem statement, all variables and given/known data
Find potential of a uniformly charged rod of length 2a

2. Relevant equations
-Superposition
3. The attempt at a solution
$$dV=\frac{kλdx}{r}, r=x$$
$$V=λk\int\limits_{-a}^a \frac{1}{x}\mathrm dx=0$$

Potential at point B is zero. Is this correct?

#### Attached Files:

• ###### image.PNG
File size:
1.6 KB
Views:
55
2. Aug 22, 2015

### BvU

No. Your integral doesn't exist. But even before, what is it you are integrating, and over what are you integrating ?

As a check: it is likely that V = 0 at infinity, so it can't be 0 at pont B.