A point charge of magnitude + 1 μC is fixed at (0, 0, 0). An isolated uncharged spherical conductor, is fixed with its center at (4, 0, 0). The potential and the induced electric field at the centre of the sphere is :
(a) 1.8 × 105 V and – 5.625 × 106 V/m
(b) 0 V and 0 V/m
(c) 2.25 × 105 V and – 5.625 × 106 V/m
(d) 2.25 × 105 V and 0 V/m
