(a) 10 +g 5 x (ст) +9 -29 (b) 10 x (cm) -29 +9 +39 Figure 18.52 (a) Point charges located at 3.00, 8.00, and 11.0 cm along the x-axis. (b) Point charges located at 1.00, 5.00, 8.00, and 14.0 cm along the x-axis.
(a) Find the electric field at x = 5.00 cm in (a), given that q = 1.00 μC . (b) At what position between 3.00 and 8.00 cm is the total electric field the same as that for –2q alone?
(c) Can the electric field be zero anywhere between 0.00 and 8.00 cm? (d) At very large positive or negative values of x, the electric field approaches zero in both (a) and (b). In which does it most rapidly
approach zero and why? (e) At what position to the right of 11.0 cm is the total electric field zero, other than at infinity?
(Hint: A graphing calculator can yield considerable insight in this problem.)
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