1. Not finding help here? Sign up for a free 30min 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!

Mutual Induction of a solenoid and a coil

  1. Oct 30, 2011 #1
    1. The problem statement, all variables and given/known data

    A single-turn circular loop of radius R = 0.235 m is coaxial with a long 1780 turn solenoid of radius 0.0435 m and length 0.850 m, as seen in the figure below. The variable resistor is changed so that the solenoid current decreases linearly from 6.12 A to 1.46 A in 0.230 s. Calculate the induced emf in the circular loop. (The field just outside the solenoid is small enough to be negligible.)

    2. Relevant equations

    M=N*∏*μ0*n*r^2

    Vind = - N*∏*μ0*n*r^2 * di/dt

    di/dt=(1.46-6.12)/0.23


    3. The attempt at a solution

    I used mutual inductance equ to find the potential difference induced

    N is 1780, n=N/length, r=0.0435

    but I still can't get the correct answer. I don't know where I did wrong here. Does anybody help me to figure out the answer?

    The image is here:https://www.physicsforums.com/attachment.php?attachmentid=40478&d=1319965025
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?



Similar Discussions: Mutual Induction of a solenoid and a coil
  1. Rogowski coil (Replies: 0)

Loading...