Ans : Place the smaller one inside the bigger one . As potential inside a hollow conductor is same as that of its surface , the potential inside the hollow conductor is now 100 V . The potential of the smaller conductor is now 100 + 50 = 150 V . Connect the two conductors by a wire . Charge will flow from the smaller one to the bigger one as the smaller one is at 150 V and the bigger one is at 100 V .