## Answers

a) the magnetic field at the center of a square of side L is

b) the direction is into the page.

c) If the total wire is bent into a circle, then

2Pi R = 4 L

Therefore R = 2L/Pi = 2 x 0.42/Pi = 0.267 m is the radius

The magnetic field at the center of circle is

The direction of the magnetic field is into the page.

We were unable to transcribe this image

We were unable to transcribe this image

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