Electrical – How do multimeters measure inductance

inductance-measurementmultimeter

I know that some multimeters measure capacitance by applying a constant current in a time Delta t, measuring the voltage difference before and after the current was applied, and solving

I = C * (Delta V) / (Delta t)

How do they measure an inductance?

Best Answer

A multimeter I have clearly measures both capacitance and inductivity with a small AC signal (I'd guess in the order of 1kHz or so): measuring the inductance of a loudspeaker makes this quite audible.

Admittedly, it's not all that "multi": it doesn't measure voltages and currents but only passive components.