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How Much Work Must We Do on an Electron to Move

question 101

Multiple Choice

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

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