When charge Q1 is placed at point P1, the resulting potential at point P is V1 . When Q2 is placed at point P2 after Q1 is in position at P1, the resulting potential at P becomes V2 . What is the potential at point P if charge Q1 is then removed?
a. V1 + V2
b. V1 – V2
c. V2 – V1
d. (V1 + V2)/2
c
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