Question 10

Two point charges are located on the x−axis: a charge of +6 × 10⁻⁹ C at x = 0 and an unknown charge at x = 0.5 m. In order to have zero electric field at the point x = 1 m, this second charge has to be:

A.   +1.5 × 10−9 C				E.   +24 × 10−9 C
B.   −1.5 × 10−9 C				F.   −24 × 10−9 C
C.   +3 × 10−9 C				G.   −6 × 10−9 C
D.   −3 × 10−9 C

Formula Sheet

Question 9

Question 11

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