A quadrupole consists of 4 charges, each of +/- 1111 Coulombs, arranged in a cross around the origin; each is x = 0.01 m away from the origin.
Question 1
What is the total electric field strength at the position x = 1 m?
Answer: 8.99 x 10^9 N/C
Question 2
The total electric field strength at x = 2 m is weaker than that at x = 1 m by a factor of ...
( 1 ) 4 1 Answer: ( --- ) = --- ( 2 ) 16
Question 3
The y component of the electric field at x = 1 m due only to the negative charge at (x = 0 m, y = +0.01 m) is
Answer: +9.99 x 10^(10) N/C
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