hw09 - in parallel with the resistor as shown in the figure...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Homework for Week 9: Due Thu April 7 in class 1. (“A RLC parts mystery.”) In this problem we are dealing with a series RLC circuit with unknown R, L, and C. The circuit shown in Fig. 1 has two identical capacitors, a resistor, and an inductor, connected to an AC emf with known 0 and . Two switches S1 and S2 can bypass the resistor and one of the capacitors. An oscilloscope (not shown) is connected to measure the full time dependence of the instantaneous current from the emf. The following measurements are available: i) With both switches open, the current leads the emf by 1 (where 1 >0). ii) With S 2 closed and S 1 still open, the emf leads the current by 2 (where 2 >0). iii) With both switches closed, the current amplitude is I. What are the values of R, C and L? 2. A capacitor is charged with an ideal battery of voltage V , disconnected, and then, at t = 0, connected to a circuit with an inductor L and resistor R connected in series. A fuse is connected
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: in parallel with the resistor, as shown in the figure. The fuse functions as a wire with no resistance until a current exceeds value Imax, after which it blows and then it acts an open connection. (a) At t = 0, what is the charge Q0, on the capacitor? What is the time dependence on the charge on the capacitor, Q(t), while the fuse is still intact. (b) What is the time depence on the current, I(t), while the fuse is still intact? (c) What is the maximal voltage of the emf, Vmax, for which the fuse will not blow? (d) [EXTRA CREDIT] Assume the voltage of the emf is barely enough for the fuse to blow. When will it happen? Explain in words what happens next to the charge on the capacitor and the current through the solenoid. Sketch Q(t+) where t+ is the time after the fuse has blown. [Hint: pay attention to the initial conditions at t+ = 0.]...
View Full 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