A point charge Q is placed outside a hollow spherical conductor of radius R, at a distance r (r > R) from its centre C. The field at C due to the induced charges on the conductor is
1
Zero
2
\(k \frac{Q}{(r-R)^2}\)
3
\(k \frac{Q}{r^2}\), directed towards Q
4
\(k \frac{Q}{r^2}\), directed away from Q