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How to calculate inductance of an air-core coil with 100 turns of wire wrapped on a 1cm diameter coil form….?

4cm long?

Calculating the inductance would not be easy as you would need to know the values of the variables involved, and these would not be readily found. I suspect that it would be easier to measure the impedance and then calculate the inductance by using the formula:-

X sub L = 2 x pi x f x L therefore L = X sub L/ (2 x pi x f)

X sub L = X with the subscript L = Inductive Reactance.

pi = 3.1416 & f = frequency in Hz & L = Inductance in Henrys & X is reactance in Ohms.

CAUTION: Make sure that you know the frequency of the impedance meter.

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