What value must q2 have if the electric potential at point a is to be zero?

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17-02-2017
Physics

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What value must q2 have if the electric potential at point a is to be zero?

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MissPhiladelphia MissPhiladelphia · Answer 1 · 2017-02-28T13:21:25+01:00

MissPhiladelphia MissPhiladelphia

28-02-2017

let r be side of square
V (B) = k q2/r + k Q / sqrt[r^2 + r^2] = 0 given
q2/r + Q / r root2 = 0
q2 = - Q / root2
q2/Q = - 1/root2
q2/Q = - root2 /2 = - 0.707

q2 equals negative 0.707 times Q

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