Two metallic spheres a and b kept on insulationg stands are in contact with each other . A positively charged rod p is brought near sphere a the two spheres are separated from each other and the rod p is removed .What will be the nature of charge on spheres a and b?
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a and b are in contact
then after separation
a--->negative
b--->postive
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The nature of charge on Sphere A and Sphere B will be negative and positive respectively.
1) It is given that a positively charged rod is brought near sphere A. Note that it is not touched. This will cause opposite polarity charge (i.e. negative charge) to apprear on the surface of sphere A due to the phenomenon of induction.
2) Next, since both the spheres, A and B are separated, again induced charges (i.e. positive charge) will appear on sphere B.
3) Thus, we can conclude that the nature of charge on Sphere A and Sphere B will be negative and positive respectively.
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