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!

Magnetic Field of Rotating Coil

  1. Mar 14, 2016 #1
    • Moved from a technical forum, so homework template missing
    Magnetic field values are often determined by using a device known as a search coil. This technique depends on the measurement of the total charge passing through a coil in a time interval during which the magnetic flux linking the windings changes either because of the motion of the coil or because of a change in the value of B. As a specific example, calculate B when a 61-turn coil of resistance 194Ω and cross-sectional area 44.5m2 produces the following results: A total charge of 4.76E-4C passes through the coil when it is rotated in a uniform field from a position where the plane of the coil is perpendicular to the field to a position where the coil's plane is parallel to the field.

    I know the formula emf = -change in flux, but I don't know how to get the change in the area and how to use the charge given.
     
  2. jcsd
  3. Mar 15, 2016 #2

    BvU

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Hello duke, :welcome:

    This looks a lot like homework, so please post there and use the template ! Show what you've done so far and we'll help you.

    In exchange: when the coil is parallel to the field, flux is zero.
    And charge is the integral of current over time - the time needed to turn the coil !

    A drawing helps immensely, too !
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Magnetic Field of Rotating Coil
Loading...