Discussion
Comparing the ease of computing the field and the potential of an awkward charge distribution, the potential is easier because
Answer: B
Correct answer: it is a scalar and needs no resolution into components
The potential of a distribution is a single integral of a scalar, whereas the field requires the vector contributions to be resolved and integrated component by component. The usual practice is therefore to compute the potential and then take its gradient, which is far less work than integrating the field directly.
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