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!

RLC in an AC circuit

  1. Aug 20, 2010 #1
    1. The problem statement, all variables and given/known data
    For which of the following AC circuits does impedance depend on frequency? A circuit with
    Check all that apply.
    a resistor and inductor.
    a resistor and capacitor.
    only a resistor.

    2. Relevant equations

    3. The attempt at a solution
    I think that for a capacitor and inductor the frequency would change the impedance but im not sure?????????
    thanks for any help.
  2. jcsd
  3. Aug 20, 2010 #2


    User Avatar
    Homework Helper

    Impedance of the resistance only does not depend on the frequency.
  4. Aug 20, 2010 #3
    so I was right----- thanks--slightly off topic but I have another question
    "A circular wire loop of wire has radius 2.3cm and resistance 0.045ohms . A magnetic field is perpendicular to the loop.
    At what rate must the field change in order to induce a current of 1.4mA in the loop"
    ie. magnetic field/change in time?

    I have been searching my text book and cant find a formula thats relevant.
    Would really appreciate some help.
  5. Aug 20, 2010 #4


    User Avatar
    Homework Helper

    Magnetic flux φ = EA, where E is electric field and A is the area of ring.

    dφ/dt = A*dE/dt = V = IR.
  6. Aug 20, 2010 #5
    Thanls a lot rl.bhat
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook