In which of the following cases must E be equal to zero?

Name: In which of the following cases must E be equal to zero?
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Question

Quizplus · Accepted Answer

In case I, E must be equal to zero because there is no potential difference between the two points in the circuit.
In case II, E does not need to be equal to zero because there is a potential difference between the two points in the circuit.
In case III, E does not need to be equal to zero because the circuit is not complete and there is no current flowing.

In Which of the Following Cases Must E Be Equal