Charge of uniform density 90 nC/m3 is distributed throughout the inside of a long nonconducting cylindrical rod (radius = 2.0 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. 1.9 V
B. 1.4 V
C. 2.2 V
D. 2.8 V
E. 4.0 V
Answer: B
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Exhibit 11-1
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