Question

Two metal balls are suspended as shown in the figure. A glass rod is rubbed with silk to make it charged. Now, both the balls are touched with this glass rod. What is the observation that can be noted?

• A. The balls attract each other.
• B. The balls repel each other.
• C. No attraction or repulsion is seen.
• D. The balls initially will attract each other, but repel afterwards.

Answer 1

The correct option is B The balls repel each other.

When the glass rod is rubbed with a silk cloth, it acquires positive charge and silk become negatively charged. So when both the metal balls are touched with the glass rod, both the balls acquire the same kind of charge as that of the glass rod. As we know that like charges repel each other, the two positively charged balls repel each other.