Example

What is the field strength at the center of a loop that has 5 Amps running through 300 turns, where the radius of the loop is 6 cm?

Bat center of loop = mo N I / 2R

B = (4p x 10-7 T*m/A) * 300 * 5A / (2*.06m)

= .0157 T = 157 Gauss.

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