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Standard XII
Physics
Electric Field Due to a Sphere and Thin Shell
A spherical b...
Question

A spherical body P has a positive charge on it. It attracts an another sphere Q placed near it. The sphere Q is

A
negatively charge
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B
positively charge
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C
neutral
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D
may be negative or neutral
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Solution

The correct option is D may be negative or neutral
The process of charging an uncharged body by rubbing it with another suitable body is called electrification by friction .
Therefore, when a body P of positive charge is rubbed against a body Q, the two bodies will attract if the body Q is negatively charged. Also, when a body P of positive charge is rubbed with an uncharged body Q, the body Q acquires a charge opposite to the charge of the body P. That is, negative and they attract each other as unlike charges attract.
Hence, a spherical body P having a positive charge on it attracts an another sphere Q placed near it only if the sphere Q is negatively charged or neutral.

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