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Solenoid Practical Problem

  1. Oct 8, 2009 #1
    I am trying to make a an electric door lock releaser. I am going to use a solenoid to make an electromagnet that will pull down a handle to release the lock. The electromagnet has to act from a distance of 1 cm. And it has to impart a force of at least 10 N. The problem is to design the electromagnet to operate at 12v. I mean to ask, how many turns of wire?, what diameter of wire and the iron-core?. Whats the method to find them?

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  2. jcsd
  3. Oct 8, 2009 #2
    Put it in short my question is--
    , Given a solenoid, you can find the magnetic field strength by B = uNI.
    But How do I calculate how much force this field will impart in a piece of iron some distance away?
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