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!

Net current in a solenoid or torroid

  1. Oct 8, 2014 #1
    The notion of multiplying the current in each loop in a toroid or solenoid with the total number of loops in order to find out the net current in the toroid or solenoid is appearing a bit confusing.
    Why do we do this when we know the same current is flowing through each loop (just like water flowing in a pipe)?
    When the wire is a straight conducting wire we take the net current as ' i ' but in toroid or solenoid it is
    ' n.i ' where n is the number of turns of the coil. What is the cause for this?
     
  2. jcsd
  3. Oct 8, 2014 #2

    Dale

    Staff: Mentor

    Current is the amount of charge that flows across a defined surface in a unit time. Generally, you take the surface to be the cross section of the wire, but you can choose a different surfsce. Sometimes, the surface of interest is one crossed by n wires each carrying a current of I. The charge crossing such a surface in a unit time is nI, so the current through that surface is n times the current through the wire.
     
  4. Oct 8, 2014 #3
    thanks for the explanation...
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Net current in a solenoid or torroid
  1. Solenoid Problem (Replies: 6)

Loading...