This one is tricky.
How many turns will be required to produce a 5-microhenry inductor using a powdered-iron toroidal core that has an inductance index (A L) value of 40 microhenrys/100 turns?
A 79 turns
B 141 turns
C 13 turns
D 35 turns
N=100 x √5/40
Northeast Cracker Barrel Net 
Answer D 35 turns
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answer Saturday am including equation
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I was planning to take my Extra exam this spring, but it looks like all exam sessions have been canceled.
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Oh well, being a general ain’t so bad.
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