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

Equation For Electrical Production

  1. Aug 31, 2012 #1
    SO i am trying to figure out how much electricity can be produced through elector magnetism.

    I figure the information needed would be

    1.Density of the magnetic field.
    2. The # of coils in the solenoid
    3. The rate at which the solenoid passes over the magnetic field.
    4. The distance the solenoid is from the magnetic field
    5. The angle at which the solenoid comes in contact with the magnetic field

    Am i missing any? and is there an equation that knowing these values i could calculate the amount of electricity produced. Or visa versa Knowing how much electricity i need to produce but be able to figure out the density of the magnetic field i would need to produce that amount of electricity. all the help i could get would be super duper,

    Thanks, AnAverageJoey
  2. jcsd
  3. Aug 31, 2012 #2


    User Avatar
    Science Advisor
    Gold Member

    Welcome to Physics Forums. What you need is to understand Faraday's Law.

  4. Aug 31, 2012 #3
    So to generate 240 volts from a solenoid with 4 coils that passes over an unknown magnetic field at 29m/s it would take a magnetic field with a density of 2.0689 T?

    Represented by 240v= (4)(x)(29) where x is the density of the magnetic field?

    Ik it sounds like a homework question but its not just a personal project question lol
  5. Aug 31, 2012 #4


    User Avatar
    Science Advisor
    Gold Member

    Note that you are referring to the upper right example where ΔA/Δt is the rate of change of the area of the loops with respect to time.

    Variations of Faraday's Law
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook