A glass rod is rubbed with silk to make it charged. Now, touch both the balls with this glass rod. The balls each other.

start attracting

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start repelling

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Solution

The correct option is B start repelling
When the glass rod is rubbed with silk, it becomes charged. Now, when both the metal balls touch the glass rod, both balls acquire the same kind of charge as that of the glass rod. As we know that like charges repel each other, these two balls will repel each other.

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Q. When a glass rod is rubbed with silk, both become charged due to:

When a glass rod is rubbed with a piece of silk cloth, then :

(a) the glass rod and silk cloth both acquire the positive charge.

(b) the glass rod becomes positively charged while the silk cloth has a negative charge.

(d) the glass rod becomes negatively charged while the silk cloth has a positive charge.

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