A Long Cylindrical Conductor (Radius = 1

A long cylindrical conductor (radius = 1.0 mm) carries a charge density of 4.0 pC/m and is inside a coaxial, hollow, cylindrical conductor (inner radius = 3.0 mm, outer radius = 4.0 mm) that has a total charge of −8.0 pC/m. What is the magnitude of the electric field 2.0 mm from the axis of these conductors?

A) 24 N/C
B) 18 N/C
C) zero
D) 36 N/C
E) 226 N/C

Correct Answer:

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