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Using Kirchhoff’s rules, (a) find the current in each resistor shown in Figure P 18.25 and (b) find the potential difference between points $c$ and $f.$

a. I_{1}=0.39 m A, I_{2}=2.69 m A, I_{3 k}=3.08 m A

b. V_{c f}=69.24 V

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