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: Does it matter how many turns it makes for dingint he moment and torque?

  1. Nov 2, 2005 #1
    Hello everyone 'im confused...all these problems keep bringing up how many times a coil turns, and yet the forumla/book doesn't apply the case if its turning or spinning. FOr example, this problem asks:
    A circular coil of 200 turns has a radius of 2.10 cm.

    (a) Calculate the current that results in a magnetic dipole moment of 2.30 Am2.
    (b) Find the maximum torque that the coil, carrying this current, can experience in a uniform 40.0 mT magnetic field.

    I know the equation:
    M = AI;
    Would i use the area of a circle because its a coil? and why does it tell me it turns 200 times, is it goign to effect the area or current or what?> Also to find the maximum torque, can i use the equation of:
    T = IAB? where B is the magnetic field, and A is the area nad I is the current?
  2. jcsd
  3. Nov 2, 2005 #2
    it isnt turning 200 times, it means that the wire is wrapped around the core 200 times, or there is 200 layers of wire around the core.
  4. Nov 2, 2005 #3
    How does that effect the area or current?
  5. Nov 2, 2005 #4
    n/m i got it
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook