Arun
Last Activity: 5 Years ago
Let B and C have charge Q each initially and are seperated by r distance.
∴ Coulomb force between them, F=
r
2
KQ
2
...........(1)
Now an identical uncharged spherical conductor A is brought in contact with B. They will share equal charge among themselves.
Charge on A=
2
Q
Charge on B=
2
Q
Now the conductor A is brought in contact with C. They will share equal charge among themselves.
∴ Charge on A or C =
2
Q+
2
Q
=
4
3Q
New coulomb force between B and C:
F
′
=
r
2
K
2
Q
×
4
3Q
=
8
3
r
2
KQ
2