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Body placed at the centre are shown. Ide...

Body placed at the centre are shown. Identify the polarity of the charge & draw the electric field lines due to it.

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For a single charge the potential `V=(q)/(4piepsi_(0)r)`
This shown that V is constant if .r. is constant. Greater the redius smaller will be the potential. In the given figure potential is increasing. This shows that the polarity of charge is positive. The direction of electric field will be radially inward. the field lines are directed from here to lower potential.
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