# A charge of #5 C# is at the origin. How much energy would be applied to or released from a # -4 C# charge if it is moved from # ( 8, 2 ) # to #(9 , 6 ) #?

##### 1 Answer

#### Explanation:

Click here for the situation:

http://tube.geogebra.org/student/m2354629

We can work out the electric field potential at point R.

Then we work out the electric field potential at point Q.

We can then get the work done in moving a charge of

Potential at point R:

From the diagram you can see that:

So from

Potential at point Q:

From the diagram you can see that:

So from

So the potential difference

The work done in bringing a charge of

This means work would have to be applied to the charge.

There are no units of distance given. If you were using metres then