Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Induced Current in a Circuit by a Moving Magnet

  1. Oct 23, 2007 #1
    A 10-cm-wide, zero-resistance slide wire is pushed toward a 2.0 ohm resistor at a steady speed of 0.50 m/s. The magnetic field strength is 0.50 T. How much power does the pushing force, 6.25*10^-4 supply to the wire? What is the magnitude of the induced current?

    I got 3.13*10^-4 for the first part, which is probably correct because it's a simple formula. Just the pushing force times the velocity. However, I cannot figure out how to determine the second part of the question.


    While R is given, V is not because it's an induced current. I'm so confused. Help please?
  2. jcsd
  3. Oct 24, 2007 #2


    User Avatar
    Homework Helper

    Motional EMF produced across the slide wire is given by E = vBL and the induced current I = E/R = vBL/R
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook