Potential: How much work must we do on an electron to move it from point A, which is at a potential of +50 V, to point B, which is at a potential of -50 V, along the semicircular path shown in the figure? Assume the system is isolated from outside forces. (e = 1.60 × 10-19 C)
A. 1.6 J
B. 1.60 × 10-17 J
C. -1.60 × 10-17 J
D. -1.6 J
E. This cannot be determined because we do not know the distance traveled.
Answer: B
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