A body of mass one gram and carrying a charge 10−8C passes through two points P and Q. The electrostatic potential at Q is 0V. The velocity of the body at Q is 0.2ms−1 and at P is √0.028ms−1. The potential at P is
150V
300V
600V
900V
A
900V
B
300V
C
600V
D
150V
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