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A spherical conductor A contains two sph...

A spherical conductor A contains two spherical cavities. The total charge on the conductor itself is zero. However, there is a point charge `q_b` at the centre of one cavity and `q_c` at the centre of the other. At considerable distance r away from the centre of the spherical conductor, there is another charge `q_d`. Forces acting on `q_b, q_c and q_d` are `F_1, F_2, and F_3`, respectively. [Assume all charges are positive.]

A

`F_1ltF_2ltF_3`

B

`F_1=F_2ltF_3`

C

`F_1=F_2gtF_3`

D

`F_1gtF_2gtF_3`

Text Solution

Verified by Experts

The correct Answer is:
B
`F_(3)-(K(a_(b)+q_(d)))/(r^(2))`
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