A plastic comb is rubbed against dry hair gently. What is the effect on both the plastic comb and dry hair?

Both get charged

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Both get discharged

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Plastic comb gets charged, but dry hair gets discharged

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Dry hair gets charged, but plastic comb gets discharged

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Solution

The correct option is A
Both get charged

When a plastic comb is rubbed against dry hair vigorously, then there is a transfer of charge taking place between the two. As a result, both objects become charged. While one becomes positively charged, the other becomes negatively charged.This is called charging by friction.

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