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Exam 28: Direct-Current Circuits

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Which two circuits are exactly equivalent? Which two circuits are exactly equivalent?

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Question 81

What is the potential difference Vb − Va shown in the circuit below. What is the potential difference V<sub>b</sub> − V<sub>a</sub> shown in the circuit below.

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Question 82

At what rate is power supplied by the 10-V emf shown below? At what rate is power supplied by the 10-V emf shown below?

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Question 83

What is the equivalent resistance between points a and b when R = 12 Ω? What is the equivalent resistance between points a and b when R = 12 Ω?

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