# Charges electrical point

1. May 7, 2004

### becca

Two point charges with the values of 3.4 microC and 6.6 microC are separated by 0.10 m. What is the electrical potential at the pont midway between the two point charges? (kc= 8.99 x 10^9 Nm^2/C^2)

2. May 7, 2004

### Staff: Mentor

electric potential

The potential at a distance "r" from a point charge of Q is given by:
$$V = \frac{kQ}{r}$$

3. May 9, 2004

### jatin9_99

V= -kQ/r i just added a negative sign to it to make it more sophesticated

4. May 9, 2004

### Staff: Mentor

sophisticated but wrong :-)

The minus sign is incorrect. The potential increases as you get closer to a positive charge. (The zero potential is taken to be at r = ∞.)

5. May 9, 2004

### Ebolamonk3y

He might of been thinking about E= -dv/dx... kinda like F= -dU/dx...