If you have a coil consisting of 500 turns on a magnetic core witha cross-sectional area of 0.35 inch, and a permeability rating of750, and the coil is 1.5 inches long, what is the inductance?
a. 6580 mH b. 1460 mH c. 13 mH d. 100 mH
I am having trouble with this. Equation in book statesにuoWhereu_o=4pi *10^-^7and converting inches to m on coil would be .00899m for crossectional area and .0381m the length of the coil. Plugging them in should get me:
4pi*10^-^7\frac{(750)(500^2)(.00889)}{.0381}=54.978HWhich is none of the answers so something is wrong.