Question

difference between electric potential and potential difference ​

Answer 1

First case is related to Electrical potential.

Suppose A source charge you can say a power full charge is placed so it has some influence space around it where it can affect other charges around it. So if we have to bring one point charge which is placed outside influence area suppose placed at infinity, to inside influence space of source charge some work has to be done and that work is restored as a potential of that charge that potential is known as electric potential.

Case 2 - this case refers to potential difference

In this case test charge is already placed inside influence area of source charge so it already got some amount of electric potential if test charge move between two point with in influence of source charge there will be differences in the potential across those two points so this is called potential difference.

Electric Potential =Work done/q

Where work is done to bring a charge q from infinty to any point inside influence space of Q

Potential Difference = WORK DONE/ q

Where work is done to bring a charge qbetween two points within influence space of Q.

Answer 2

Electric potential : lt is the work done per unit charge in bringing a charge from infinity to a particular point.

Potential difference: lt is the work done per unit charge for moving it from one point to another point.