- #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=u

_{0}nI

B=u

_{0}I/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*10

^{76}T or B=4.08*10

^{-2}

b) B=4piE-7=17/(2*.001)=1.1

^{-3}T

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

all help appreciated.