Homework Answers
a) inductance = uN^2A/ l
= 4pi*10^-7*505^2 * pi*(0.0072)^2 / 0.142
= 3.6*10^-4 H = 0.36 mH
b) time constant = L/R
= 3.6*10^-4 / 2.5 = 1.47*10^-7 s
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