A point charge Q = - 400 nC and two unknown point charges,q₁ and q₂,are placed as shown.The electric field at the origin O,due to charges Q,q₁ and q₂,is equal to zero.In the figure,the number of excess electrons in charge Q,is closest to: A)2.5 × 10² B)1.4 × 10² C)2.9 × 10² D)-1.4 × 10² E)-2.5 × 10²

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The Answer of A point charge Q = - 400 nC and two unknown point charges,q₁ and q₂,are placed as shown.The electric field at the origin O,due to charges Q,q₁ and q₂,is equal to zero.In the figure,the number of excess electrons in charge Q,is closest to: A)2.5 × 10² B)1.4 × 10² C)2.9 × 10² D)-1.4 × 10² E)-2.5 × 10²

A Point Charge Q = - 400 NC and Two