Multiple Point-Charges: a Point Charge Q = -500 NC and Two

Multiple Choice

Multiple point-charges: 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

A) 130 nC.
B) 76 nC.
C) 150 nC.
D) -76 nC.
E) -130 nC.