# Point Charge

1. May 5, 2009

### Avis

1. The problem statement, all variables and given/known data
Points A and B are 4.8cm and 7.2cm away from a point charge of -6.2$$\mu$$C at point C. AC and CB are at right angles.

a. How much work must be done in moving a 2.0x10^-12C charge from A to B
b. what is the potential difference between points A and B?

Ive been working at this problem with a friend for about a half hour. I have No idea what to do. Everything we tried failed.

2. May 5, 2009

3. May 5, 2009

### Avis

i tried that.. but maby iwas using the wrong equation. Which equation should i be using?

4. May 5, 2009

### davieddy

The one which tells you the potential at distance r from a charge Q

5. May 5, 2009

### Avis

so V=kq/r. I tried this. It did not work.