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Four point charges are given as: +2q, +2q, −2q and –2q. Place these charges on an...

Four point charges are given as: +2q, +2q, −2q and –2q. Place these charges on an x-y coordinate system, with two of them are on the x and y axis, so that the electric field at point (3 cm, 3cm) would be zero. Find

i) Electric field at the origin if the above point charges magnitude is 5.0 μC.

ii) Potential energy of the above configuration.

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