On rubbing glass rod and silk, if the glass rod loses five electrons, wool gains electrons.

less than five

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more than five

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five

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Solution

The correct option is C five
On rubbing two different materials such as glass and silk, they both become charged. Transfer of electrons takes place from one body to another. Whatever number of electrons the glass rod loses, the same number of electrons are gained by wool.

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In each of the following cases, state which body loses electrons :

(a) A glass rod when rubbed with silk.

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When a glass rod is rubbed with silk cloth, both glass rod, and silk cloth.

Charging by friction is accompanied by loss or gain of electrons. State which body loses electrons when a glass rod is rubbed with silk,

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