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 emf in a coil

  1. Mar 25, 2010 #1
    1. The problem statement, all variables and given/known data
    A coil is wrapped with 247 turns of wire on the perimeter of a square frame of sides 27.3 cm. Each turn has the same area, equal to that of the frame, and the total resistance of the coil is 2.53. A uniform magnetic field is turnedon perpendicular to the plane of the coil. If the field changes linearly from 0 to 1.11Wb/m2 in a time of 0.822 s, find the magnitude of the induced emf in the coil while the field is changing.
    Answer in units of V.​

    2. Relevant equations
    flux = B*a*cos(theta)
    E = -N (flux/t)

    3. The attempt at a solution
    flux = (1.11)(745.29)(1/10000) = .074529
    E = (247)(.074529)/(.822) = 22.395
    Just not sure if it is right or not
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Mar 27, 2010 #2

    Redbelly98

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    Welcome to PF :smile:

    Looks good!
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook