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.

(c) the glass rod and silk cloth both acquire the negative charge.

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

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Solution

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

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A glass rod is rubbed with a silk cloth and an inflated rubber balloon is rubbed with a woollen cloth.

Now, out of glass rod, silk cloth, rubber balloon and woollen cloth:

(a) Which two objects acquire negative charge?

(b) Which two objects acquire positive charge?

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1.6 \times 10^{- 13} C

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