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!

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