This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: johnson (rj6247) – hw 14 – Opyrchal – (121014) 1 This printout should have 10 questions. Multiplechoice 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 Ω. Explanation: Let : I rms = 12 . 7 A , V rms = 244 V , and φ = 37 ◦ . The average power delivered by the generator is dissipated as heat in the resistor: P av = I rms V rms cos φ = (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 Ω . 002 (part 2 of 2) 10.0 points Calculate the reactance X L X C of the cir cuit. Correct answer: 11 . 5624 Ω. Explanation: For the reactance, tan φ = X L X C R X L X C = R tan φ = (15 . 3439 Ω) tan( 37 ◦ ) = 11 . 5624 Ω . 003 (part 1 of 2) 10.0 points In a series RLC circuit, the resistance is 29 Ω, the capacitance is 79 μ F and the inductance is 40 mH. Theis 40 mH....
View
Full
Document
This note was uploaded on 03/11/2010 for the course PHYS 121 taught by Professor Opyrchal during the Spring '08 term at NJIT.
 Spring '08
 Opyrchal
 Work

Click to edit the document details