Question

A charge of \( 10^{-9} \, \text{C} \) is placed on each of the 64 identical drops of radius 2 cm. They are then combined to form a bigger drop. Its potential will be:

• A. \( 7.2 \times 10^{3} \, \text{V} \)
• B. \( 7.2 \times 10^{2} \, \text{V} \)
• C. \( 1.44 \times 10^{2} \, \text{V} \)
• D. \( 1.44 \times 10^{3} \, \text{V} \)

Hint:

The potential of a drop is directly proportional to the charge and inversely proportional to the radius. When drops combine, their total volume (and hence their radius) increases, but the total charge remains constant.

Answer 1

The Correct Option is A