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A Point Charge Q = - 400 NC and Two

Question 58

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A point charge Q = - 400 nC and two unknown point charges,q<sub>1</sub> and q<sub>2</sub>,are placed as shown.The electric field at the origin O,due to charges Q,q<sub>1</sub> and q<sub>2</sub>,is equal to zero.In the figure,the number of excess electrons in charge Q,is closest to: A) 2.5 × 10<sup>2</sup> B) 1.4 × 10<sup>2</sup> C) 2.9 × 10<sup>2</sup> D) -1.4 × 10<sup>2</sup> E) -2.5 × 10<sup>2</sup> 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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