- #1
exuberant.me
- 29
- 1
A certain charge 'Q' is to be divided into two parts, q and Q-q. What is the relationship of 'Q' to 'q' if the two parts, placed at a given distance 'r' apart, are to have maximum Coulombic repulsion? What is the work done in reducing the distance between them to half its value?
It went easy for the first part
as f(q) = k(q)(Q-q)/r2
and, f'(q) = 0 gives q = Q/2 which provides max repulsion (as f''(q) < 0)
But it is getting a bit "confusing" to calculate the work done for the second part..
someone please provide the idea.
It went easy for the first part
as f(q) = k(q)(Q-q)/r2
and, f'(q) = 0 gives q = Q/2 which provides max repulsion (as f''(q) < 0)
But it is getting a bit "confusing" to calculate the work done for the second part..
someone please provide the idea.