External Work. Consider two charges lying on the xy plane. One charge q1 = +Q is at (0, a ), and another charge q2 = +Q is at (-2a,0). What would be the work needed by an external force if we want to move charge q3 = -Q from infinity to the origin (0,0)? a. -3kQ²/2a b. -kQ?/2a c. 0 d. kQ²/2a

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1. External Work. Consider two charges lying on the xy plane. One charge q, = +Q
is at (0, a ), and another charge q2 = +Q is at (-2a, 0). What would be the work
needed by an external force if we want to move charge q3 = -Q from infinity
to the origin (0,0)?
a. -3kQ²/2a
b. -kQ²/2a
с. 0
d. kQ²/2a
Transcribed Image Text:1. External Work. Consider two charges lying on the xy plane. One charge q, = +Q is at (0, a ), and another charge q2 = +Q is at (-2a, 0). What would be the work needed by an external force if we want to move charge q3 = -Q from infinity to the origin (0,0)? a. -3kQ²/2a b. -kQ²/2a с. 0 d. kQ²/2a
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