Question

A, B and C are three conductors with capacitances of `0.4 mF, 2.5 muF` and `2.4 muF`, respectively. Ift he charges on them are `45 muC`, `10 muC` and `20 muC`, respectively, find the direction of flow of positive charge when each is connected with the other with a conducting wire.

Answer 1

`V = Q//C`
Potentia of `A = V_(A) = (Q_(A))/(C_(A)) = (4muC)/(0.4muF)= 10V`
Potentia of `B = V_(B) = (Q_(B))/(C_(B)) = (10 muC)/(2.5muC) = 4V`
Potential of `C = V_(C) = (Q_(C))/(C_(C)) = (20muC)/(2.5muF) = 8V`.
Positive charge always flow from a body at high potential kto a body at low potential. It flow from A to both B and C. Charge also flows from B to C.