An air-core inductor has a total inductance of 4.7 mH.
a. What is the inductance if the only change is to increase the number of turns by a factor of three?
b. What is the inductance if the only change is to increase the length by a factor of three?
c. What is the inductance if the area is doubled, the length cut in half, and the number of turns doubled?
d. What is the inductance if the area, length, and number of turns are cut in half and a ferromagnetic core with a μr of 1500 is inserted?
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