In the practice problem, wouldn B have more resistance, since has less area, so there would be less current?
If you consider small slices of equal width at B and at A, yes, the slice at would have less resistance because it has more area. But the potential drop across the slice at A would be less than that at B… the electric field is smaller at A than B (, and .) The current must be constant since charges can’t pop in and out of existence!
Related Questions
- For the first practice quiz problem, what would happen if the light bulbs were connected in parallel? Would the one with less resistance always burn brighter, or would it depend on the case?
- In the practice problem, wouldn B have more resistance, since has less area, so there would be less current?
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