Field & Potential

1. A
2. B
3. A

1)A
2)B
3)B

(1) B
(2) A
(3) B

Sir, am I correct? The potential of the sphere is 14πε_o(QR+ql). However the induced charge on the surface of the sphere is just +Q. Now, as the sphere is earthed the potential of the sphere becomes zero and charge flows only from the surface of the sphere. So net remaining charge on the surface is -qRl ie (c).