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Q.

Is it true that when we rub plastic comb with hair, they get charged but the same thing does not happen for metal comb?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
When two bodies are rubbed with each other, an exchange of electrons takes place. Now, combs are generally made of plastic and plastic is an insulator, which means that it doesn't allow the current to flow through it. Since metal comb is a conductor, as soon as it is charged, the charges flow through it into our body and go into the ground.
 
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