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Solenoid Magnetic Field Help

  • Thread starter pat666
  • Start date
  • #1
709
0

Homework Statement


You have 12m of 0.50mm diameter copper wire and a power supply capable of passing 17A through the wire.
a)What magnetic field strength would you obtain inside a 2.0cm diameter solenoid with the wire spaced as closely as possible?
b)What magnetic field strength would you obtain at the center of a single circular loop made from the wire?

Homework Equations


B=u0nI
B=u0I/2r

The Attempt at a Solution


a) n=pi*0.002=0.00628 or n=12/.00628=1909.86 not sure on this
B=4pi*E-7nI B=1.34*1076T or B=4.08*10-2
b) B=4piE-7=17/(2*.001)=1.1-3T


b is definitely wrong but I dont know why and I am completely unsure on a.
all help appreciated.
 

Answers and Replies

  • #2
rl.bhat
Homework Helper
4,433
7

Homework Statement


You have 12m of 0.50mm diameter copper wire and a power supply capable of passing 17A through the wire.
a)What magnetic field strength would you obtain inside a 2.0cm diameter solenoid with the wire spaced as closely as possible?
b)What magnetic field strength would you obtain at the center of a single circular loop made from the wire?
n = 12/π*0.0205

Radius of the single loop = R = 12/2π
 
  • #3
709
0
thanks for that, do you know whats wrong with a???
 

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