A comparison of the commercial non-inductive resistors to wire-wound resistors and the effect the inductance has on overall impedance. In the discussion I get powers of 10 off a couple of times while talking but I hope you can see the real message. It is difficult to say everything perfectly but the accurate analysis is in the instruments and data sheet. I might also add that the four (4) large resistors have the inductance of only one resistor since two are in parallel (which halves the inductance) and then in series with another pair just like it which would give an inductance value of only one resistor. Inductance introduced by the connecting wires to the loads (depending on the length) could be a significant part of the circuit inductance that would affect frequencies at 20 KHz and above but very little effect on lower frequencies.
29 ноя 2012
