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Question

# An unchanged conductor A is brought near a positively charged conductor B, then

A
the charge on B will increase but potential of B will not change.
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B
the charge on B will not change but the potential of B will decrease.
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C
the charge on B will decrease but potential of B will not change.
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D
the charge on B will not change but the potential of B will increase.
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Solution

## The correct option is B the charge on B will not change but the potential of B will decrease. When sphere A is brought near B, charge will get induced on the sphere A as shown. The charge on sphere B is conserved, so charge on B will not change. Now due to this induced charge in sphere A, the potential of B will be affected. As the negative charge is closer to B than the positive charge, the potential of B will decrease. Hence, option (b) is correct.

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