Question

The work done in bringing a unit positive charge from infinite distance to a point at distance x from a positive charge Q is W . Then the potential V at the mid point of the line joining the two charges is

Answer 1

Answer:

negative b

Explanation:

becausr then the potential v at the mid point of the line joinig the two charges is. negative

Answer 2

The work done in bringing a unit positive charge from infinity to a point at distance x from a positive charge q is W.

1)This work is the potential at that point x.The closer you try to bring the unit positive charge towards the other positive charge the more the two charges will try to repel and more work has to be done .This in term will correspond to an increase in potential at that point.

2)The potential at a distance X is W.

3)Now to calculate the potential at the midpoint of a line joining the two charges can be done using the same principle.

4)Since the midpoint can be said as 1/2

X therefore the potential at the midpoint will twice the potential at x.

5)Since the potential increases with decrease in distance the potential at the midpoint will be twice the potential at X.

6)The potential V at midpoint will be 2W.