Question

a point charge of 5 micro coulombs is placed at the origin and a second point...

a point charge of 5 micro coulombs is placed at the origin and a second point charge of -3 micro coulombs is placed at x=0.370m. where along the x axis can a third charge be placed so that the net force on it is zero?

for this part I got 1.64m which was marked corrected

but the second part asks, what if both charges are positive?

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Answer #1

If both charges are positive then the third charge should be placed someplace in between both the charges so the the net force on it will be zero. Let the third charge be q. (Any charge value can be assumed )

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