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Unformatted text preview: parallel R R Therefore, R eq = 14 + 4 = 18 . ______________________________________________________________________ 5 (3 marks) Given that the power absorbed by the 15 resistor is 15 W. Find the resistance R. Solution: Known quantities: Schematic; power absorbed by the 15 resistor. Find: Resistance of R. Analysis: The power dissipated by the 15 resistor is: P 15 = v 15 2 =15 W, therefore v 15 =15 V and i 1 = 1 A. Using the current dividing rule: A 1.5 ) (i 10 15 i 1 2 = = Applying KCL, we can find i R : i R = i 1 + i 2 = 2.5 A. Using KVL: 25 + 2.5R + 15 = 0, therefore, R = 4 ....
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 Three '09
 ZhengLi
 Resistor, Electrical resistance, Series and parallel circuits, equivalent resistance, reference voltage polarity

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