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Two charges 3 × 10^-8C and -2 × 10^-8C are 15 cm apart. At what point on the line joining the charges, the electric potential is zero?

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Two charges 3 × 10-8C and -2 × 10-8C are 15 cm apart. At what point on the line joining the charges, the electric potential is zero? Let the electric potential at infinity is zero.

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Potential at point P

V1 + V2 = 0

x = 0.45m = 45 cm

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