Homework15

Homework15 - johnson (rj6247) hw 14 Opyrchal (121014) 1...

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Unformatted text preview: johnson (rj6247) hw 14 Opyrchal (121014) 1 This print-out should have 10 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 2) 10.0 points In a certain series RLC circuit, the rms cur- rent is 12 . 7 A , the rms voltage is 244 V and the current leads the voltage by 37 . What is the total resistance of the circuit? Correct answer: 15 . 3439 . Explanation: Let : I rms = 12 . 7 A , V rms = 244 V , and =- 37 . The average power delivered by the generator is dissipated as heat in the resistor: P av = I rms V rms cos = (12 . 7 A) (244 V) cos(- 37 ) = 2474 . 81 W , and the power dissipated in the resistor is P av = I 2 rms R, so the resistance is R = P av I 2 rms = 2474 . 81 W (12 . 7 A) 2 = 15 . 3439 . 002 (part 2 of 2) 10.0 points Calculate the reactance X L- X C of the cir- cuit. Correct answer:- 11 . 5624 . Explanation: For the reactance, tan = X L- X C R X L- X C = R tan = (15 . 3439 ) tan(- 37 ) =- 11 . 5624 . 003 (part 1 of 2) 10.0 points In a series RLC circuit, the resistance is 29 , the capacitance is 79 F and the inductance is 40 mH. Theis 40 mH....
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Homework15 - johnson (rj6247) hw 14 Opyrchal (121014) 1...

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