What is the approximate electric field


A 100.0 m long rod with a diameter of 3.0 mm has a charge of 1028 C. What is the approximate electric field 4 mm from the surface of the rod, not near either end? (The constant e0 is 8.85 × 10-12 C2/N·m2.)

Multiple Choice Answers:

A. 3.4e13 r N/C
B. 2.4e11 r N/C
C. 4.1e13 r N/C
D. 2.7e11 r N/C

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Physics: What is the approximate electric field
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