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I am sure this is very basic but i am struggling to derive or work this out, and i have looked, on the internet and text books and can't find this.

The electric potential at a point is defined as the work done per unit charge to move a small test charge from infinity to that point.

And an equation for it is : EP = k*(Q/R)

I want to get back to the definition from this equation, but i cant get very far:

here is what i have done: WD= work done

Q/R = (wd/v)/R

= wd/vR

But i can't go much further without it just going back to the original form.... Can anyone help me?

Thanks

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# About electric potential

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