A point charge Q = -500 nC and two unknown point charges, q 1 and q 2, are place

Question

A point charge Q = -500 nC and two unknown point charges, q1 and q2, are placed as shown in the figure. The electric field at the origin O, due to charges Q, q1 and q2, is equal to zero. The charge q1 is closest to

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A point charge  = -500 nC and two unknown point charges,  and , are placed as shown in the figure. The electric field at the origin , due to charges ,  and , is equal to zero. The charge  is closest to

Explanation / Answer

The electric field at the origin O, due to charges Q, q1 and q2, is equal to zero.

-[500nC/(distance)^2] x cos(30) = q1/(1.1)^2

-500nc* 0.866/4= q1/1.21

we get q1= -130 nc

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