0.04 ohms may be possible if you read through the diode in reverse bias while it was in parallel with the coil of the relay. the total resistance of the two would be less than both of them seperately. 0.4 ohms would be more realistic. Other things to consider would be the quality of the meter...
Corona can be made with AC, DC, a single electrostatic discharge, or any combination of these. It is the high voltage ionizing the air (ionized air is a conductor) and then supplying an eddy current into the ionized region that makes the light show.
Electrical transmission lines, however...
Generally speaking, Solenoids are either on or off, not so common to want a variable (continuously variable) one. I'm not as familiar with automobiles, but I can mention some things we do in industry.
In a control situation like this, we often use motors and servos. As a basic rule of...
Some intersting info from Wiki-
Bundle conductors
Bundle conductors are used to reduce corona losses and audible noise. Bundle conductors consist of several conductor cables connected by non-conducting spacers. For 220 kV lines, two-conductor bundles are usually used, for 380 kV lines...
I would be interested to know a little bit more about what you are trying to build. What you described reminds me of a plunger type variable position valve. In my field experience we often see them replaced with other types of valves that offer better control. Often the load (fluid of some...
Thank you everyone for the help.
I'll check my tester again, or maybe I got the nF/pF mixed up in my memory. I appreciate everyone's willingness to help me.
J
I think I see it now.
If I have 2 wires going out to a light bulb, with the stray capacitance between the wires (88.5Kohm in Xc), then this impedance is in parallel with the resistance of the wire (0.5ohm). The formula for parallel resistances says the total impedance will be less than the...
Thanks for the reply, but I am still a little confused.
If the impedance is the sq.rt. of the sum of the squares of the resistance (very low, like .01 ohms) and the reactance (very high), the impedance is almost equal to the reactance itself. In most of my work experience, we use these...
Hello.
I know the formula for capacitive reactance is 1/2PIfC. The function says that if frequency is constant, the Xc increases as C decreases. Question is, in a 60 hz system, stray capacitance in wire does not turn a jumper into an infinite impedance. A piece of wire 1 foot long had...