A charge of 25 nC is uniformly distributed along a circular arc (radius = 2.0 m) that is subtended by a 90-degree angle. What is the magnitude of the electric field at the center of the circle along which the arc lies?
A. 81 N/C
B. 61 N/C
C. 71 N/C
D. 51 N/C
E. 25 N/C
Answer: D
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a.
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b.
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c.
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d.
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