In an LR circuit with alternating current , it is know that the inductance of the cable is of the order 10^-7 . With a 2 ohm resistor ,the circuit is used to measure inductance.There are 2 frequencies , 100kHZ and 1M Hz,that can be chosen for the measurement . So whyI MHz is better . I know that it is beacause order of magnitude of reactance is comparable to that of resistor.But why is it better ?? Thanks!