Q1 of 26 Page 1

A point charge Q is placed at point O as shown in the figure. The potential difference VA – VB positive. Is the charge Q negative or positive?


Given: VA-VB > 0


Calculation:


Electric potential is given by,


V=


Electric potential at point A is given by,


VA=


Electric potential at point V is given by,


VB=


When VA-VB > 0 …(Given)


VA>VB


This is possible only of the charge Q is positive.


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