Charge of uniform density 50 nC/m3 is distributed throughout the inside of a long nonconducting cylindrical rod (radius = 5.0 cm). Determine the magnitude of the potential difference of point A (2.0 cm from the axis of the rod) and point B (4.0 cm from the axis).
A. 2.7 V
B. 2.0 V
C. 2.4 V
D. 1.7 V
E. 3.4 V
Answer: D
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