121homework 12

121homework 12 - Felder, Jacob Homework 13 Due: Dec 12...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Felder, Jacob Homework 13 Due: Dec 12 2006, 9:00 pm Inst: Vitaly 1 This print-out should have 13 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. 001 (part 1 of 3) 10 points An LC circuit is shown in the figure below. The 29 pF capacitor is initially charged by the 8 V battery when S is at position a . Then S is thrown to position b so that the capacitor is shorted across the 18 mH inductor. 18 mH 29 pF 8 V S b a What is the maximum value for the oscil- lating current assuming no resistance in the circuit? Correct answer: 0 . 000321109 A. Explanation: Let : C = 29 pF = 2 . 9 10- 11 F , L = 18 mH = 0 . 018 H , and E = 8 V . The maximum charge on the capacitor is Q max = C V . The maximum current is I max = Q m = C V , where is the oscillatory frequency given by = 1 LC . Thus I max = r C L V = r 2 . 9 10- 11 F . 018 H (8 V) = . 000321109 A . 002 (part 2 of 3) 10 points What is the natural angular frequency of the circuit? Correct answer: 1 . 38409 10 6 rad / s. Explanation: = 1 LC = 1 p (0 . 018 H)(2 . 9 10- 11 F) = 1 . 38409 10 6 rad / s . 003 (part 3 of 3) 10 points What is the maximum energy stored in the magnetic field of the inductor? Correct answer: 9 . 28 10- 10 J....
View Full Document

This note was uploaded on 04/03/2009 for the course PHYS 121 taught by Professor Opyrchal during the Fall '08 term at NJIT.

Page1 / 4

121homework 12 - Felder, Jacob Homework 13 Due: Dec 12...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online