{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Assignment 11 - Class PEP112S2007 Assignment 11 Assignment...

Info icon This preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Class PEP112S2007 Assignment 11 Assignment is due at 11:00pm on Sunday, April 15, 2007 Credit for problems submitted late will decrease to 0% over the course of 10 hour(s) after the deadline has passed. The wrong answer penalty is 1% per part. Multiple choice questions are penalized as described in the online help. The unopened hint bonus is 1% per part. You are allowed 10 attempts per answer. Problem 33.15 Part A What is the potential difference across a 12.0 inductor if the current through the inductor drops from 120 to 60.0 in 14.0 ? ANSWER: 51.4 V Part B What is the direction of this potential difference? That is, does the potential increase or decrease along the direction of the current? ANSWER: increase decrease Problem 33.18
Image of page 1

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

View Full Document Right Arrow Icon
A 2.0 mH inductor is connected in parallel with a variable capacitor. The capacitor can be varied from 100 pF to 200 pF. Part A What is the minimum oscillation frequency for this circuit? ANSWER: Hz Part B What is the maximum oscillation frequency for this circuit? ANSWER: Hz Power in a Decaying R-L Circuit Consider an R-L circuit with a DC voltage source, as shown in the figure . This circuit has a current when . At the switch is thrown removing the DC voltage source from the circuit. The current decays to at time . Part A
Image of page 2
What is the power, , flowing into the resistor, , at time ? Part A.1 Ohm's Law Part not displayed Part A.2 Power Dissipated Part not displayed Express your answer in terms of and . ANSWER: = Part B What is the power flowing into the inductor? Part B.1 Energy in an Inductor Part not displayed Part B.2 Equation for Part not displayed Hint B.3 Power into the Inductor Hint not displayed Express your answer as a function of and . ANSWER: = Part C
Image of page 3

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

View Full Document Right Arrow Icon
Compare the two equations for power dissipated within the resistor and inductor. Which of the following conclusions about the shift of energy within the circuit can be made? ANSWER: Power comes out of the inductor and is dissipated by the resistor Power is dissipated by both the inductor and the resistor Power comes out of both the inductor and the resistor Power comes out of the resistor and is dissipated by the inductor The difference in sign between the power dissipated by the inductor and that by the resistor tells us that one is providing the power which is dissipated by the other. The inductor provides power from its magnetic field which is subsequently dissipated within the resistor as heat for example. Oscillations in an LC circuit. Learning Goal: To understand the processes in a series circuit containing only an inductor and a capacitor. Consider the circuit shown in the figure. This circuit contains a capacitor of capacitance and an inductor of inductance . The resistance of all wires is considered negligible. Initially, the switch is open, and the capacitor has a charge . The switch is then closed, and the changes in the system are observed. It turns out that the equation describing the subsequent changes in charge, current, and voltage is very similar to that of simple harmonic motion, studied in mechanics. To obtain this equation, we will use the law of conservation of energy.
Image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern