Rubber has greater electron affinity than fur. A rubber object is charged by friction with animal fur. The rubber object is than used to charge an object A by the method of contact. Then object A will be charged

positive

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negative

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neutral

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none of these

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Solution

The correct option is B negative
The rubber object becomes negatively charged since it would acquire electrons from fur. It would then charge then object A with negative charge since contact charging result in charging an object with same type of charge.

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Similar questions

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?

Which statement best explains why a rubber rod becomes negatively charged when rubbed with fur?

How will you charge an inflated rubber balloon by the method of friction ?

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