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Calculating current

  • Thread starter matt72lsu
  • Start date
  • #1
94
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Homework Statement


You want to make a solenoid that is 38 cm long with 4300 turns. How much current should you run through the solenoid to produce a magnetic field of .75 T?


Homework Equations


B = uoNI


The Attempt at a Solution


I converted 38 cm to m (not sure where to use this number). i used the above equation but got it wrong. I have looked all in my textbook and cant find any other equation to use. help!
 

Answers and Replies

  • #2
rl.bhat
Homework Helper
4,433
7
In the equation N is the number of turns per unit length.
 
  • #3
94
0
so N x .38?
 
  • #4
rl.bhat
Homework Helper
4,433
7
so N x .38?
No. Nx0.38 = total number of turns.
N = 4300/0.38
 

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