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A point charge Q is placed at the point ...

A point charge Q is placed at the point O as shown in Fig. Is the potential difference `(V_(A) - V_(B))` positive, negative or zero if Q is (i) possible (ii) negative ?

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(i) If q is positive charge, `V_A-V_B`= positive.
(ii) If q is negative charge, `V_A-V_B`= Negative.
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