27. Resistors & DC Circuits
Intro to Current
4:48 minutes
Problem 25.69
Textbook Question
Textbook QuestionFor the wire in Fig. 25–38, whose diameter varies uniformly from a to b as shown, suppose a current I = 2.5 A enters at a. If a = 2.5 mm and b = 4.0 mm, what is the current density (assume uniform) at each end? <IMAGE>
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