1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Differential equation that describes the voltage with respect to time

  1. Sep 16, 2014 #1
    In class we discussed RLC circuits in series. My homework problem, however, has me analyzing an RLC circuit in series.

    a) Write the differential equation that describes the voltage with respect to time.
    b) Find the natural frequency of oscillation and the damping constant of the circuit.

    I know that because they are connected in parallel they all have the same voltage across them, and because we are studying damped harmonic oscillators that the equation should resemble that of a damped harmonic oscillation.

    Do the same aspects of a series circuit apply? For example:

    VsubC = q/C
    VsubL = LI'
    VsubR = IR

    or are they completely different for a parallel? I just need a push to get on the right track.
  2. jcsd
  3. Sep 16, 2014 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    I guess you meant "parallel" in that last sentence.
    These equations still apply, they are completely general. The difference with the series case is of course that now the voltage across all elements is the same at any value of t.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted