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Two charges +6 'mu'C and -6 'mu'C are pl...

Two charges +6 'mu'C and -6 'mu'C are placed 15 cm apart as shown . At what distance from A to its right, the electrostatic potential is zero (distance in cm)

A

4,9,60

B

9,45,infinity

C

20,45,infinity

D

9,15,45

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The correct Answer is:
B
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