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When a test charge q0 = 6 nC is placed at the origin, it experiences a force of 8 ? 10-4 N in the positive y direction.
(a) What is the electric field at the origin?
N/C j hat bold
(b) What would be the force on a charge of -4 nC placed at the origin?
N j hat bold
(c) If this force is due to a charge on the y axis at y = 3 cm, what is that charge (magnitude and sign)?
nC
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