A small sphere is charged to a potential of 50 V and a big hollow sphere is charged to potential of 100 V . Charge will flow from the smaller sphere to the bigger one when

• Correct answer
  A

  the smaller one is placed inside the bigger one and connected by a wire
• B

  the bigger one is placed inside the smaller one and connected by means of a wire
• C

  bigger one placed by the side of the smaller one and connected by a wire
• D

  smaller one placed by the side of the bigger one

Hence, the correct answer is option: 'A'.