Figure shows a negatively charged ebonite rod A which is brought near an uncharged metal sphere P touching the other uncharged metal sphere Q. Both the spheres P and Q stand on separate insulating stands.
Keeping rod A in position, sphere Q is removed by holding the insulating stand of it. State the kind of charge on spheres P and Q. Give reason to your answer.

Spheres Q and P has positive charge.

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Spheres Q and P has negative charge.

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Sphere Q has negative charge and sphere P has positive charge.

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Spheres Q and P has no charge.

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Solution

The correct option is C Sphere Q has negative charge and sphere P has positive charge.
Due to the negatively charged ebonite rod A, the positive charges in P and Q spheres get attracted towards ebonite rod, and thus accumulate at sphere P, and thus the remaining negative charges of neutral atoms accumulate at Q.
When these spheres are separated, the spheres retain the respective charges.

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Similar questions

Q. Figure shows a negatively charged ebonite rod A which is brought near an uncharged metal sphere P touching the other uncharged metal sphere Q. Both the spheres P and Q stand on separate insulating stands. Rod A is removed first and then sphere Q is removed by holding the insulating stand of it. What kind of charges will then be on the spheres P and Q ?

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Two identical metal spheres P and Q are supported on insulating stands and placed in contact. What kind of charges will P and Q develop when a negatively charged ebonite rod is brought near P?

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