Each 2.0-m length of a long cylinder (radius = 4.0 mm) has a charge of 4.0 nC distributed uniformly throughout its volume. What is the magnitude of the electric field at a point 5.0 mm from the axis of the cylinder?
a. 9.9 kN/C
b. 8.1 kN/C
c. 9.0 kN/C
d. 7.2 kN/C
e. 18 kN/C
d
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