Why does the thickness of a wire affect resistance?
The wire size / resistance is the NUMBER OF LANES. Wattage, or power, is the combination of both voltage * current, or the number of cars travelling down the highway in a given time. The highway has to be designed to meet the specifications for both speed and volume.
heat - Insulation on resistance wire, what's the use? - Electrical ...
2018年2月14日 · Resistance wire is also use to make wirewound resistors (typically different alloys such as Manganin or Constantan). It is typically insulated. Such wires are not intended to get very hot- the advantages of the alloys used are that they have a low TCR (Temperature Coefficient of Resistance) near room temperature up to perhaps 100°C).
soldering - How to solder resistance wire? - Electrical Engineering ...
2019年1月16日 · The resistance wire is labelled RD 100/0.1 and has a resistance of 62.4 Ohm per meter. The brand is Isotan and the fomula seems to be CuNi44. The German data sheet even says "Isotan is simple to process.
Resistance of wire - Electrical Engineering Stack Exchange
2020年1月26日 · If the wire resistance is at most a few milliOhms, it is inconsequential when compared to the allowed sample variation in the resistor value. On the other hand, if a circuit requires a 10 Ohm 0.1% resistor, the resistance of the wire and contact between wire and device might need to be considered.
resistors - Resistance of twin core wire - Electrical Engineering …
I'm trying to do a problem for revision and I'm running into problems calculating the resistance of this circuit used to approximate a twin-core wire. It's used later in the question with the middle resistors being treated as a plastic layer, but I'm struggling with the first part of the question which is to calculate the total resistance R ...
Does wrapping kiln resistance wire back on itself reduce the ...
2023年6月15日 · To the extent that the reversed bit makes good electrical contact with the wire it's twisted with, it reduces the resistance, reducing the I 2 R heating in that section. If the wire is not twisted tightly, or if the wire has an oxidised or otherwise contaminated surface, electrical contact will not be good, and there may be no temperature ...
Will resistance of wire increase with age due to some effects?
2019年11月10日 · As a school boy electrical enthuiasist I suspect there may increase in ohmic resistance at wire (due to some effects) series to the parallel combination of these two switches. So lamp which has high resistance able to grab some enough voltage despite that unknown series resistance. But motor which has lower resistance cannot.
Calculate the temperature rise in a wire due to current
2021年8月16日 · A typical 20 AWG stranded wire is 0.62 mm 2 CSA and has a resistance of 32.4 Ω/km. A device draws a constant 10 amps at 12 V through the wire. There would be a volt drop over the 5 m wire. 10 A x (5 m x 0.0324) = 1.62 V. Total power passing into the wire is P = IV 120 W and power lost in the wire is 1.62 V X 10 A = 16.2 W
Temperature of resistance wire - Electrical Engineering Stack …
2023年2月28日 · Then, knowing wire resistance per length you can calculate the voltage required to achieve that current for any given length. Actually, instead of cutting it shorter each time you could just move the electrical contact down the wire so current is …
resistance - Will doubling thinner wire in lieu of thicker wire work ...
2014年5月19日 · Yes, this is a common practice. With electric motors, for example, we often substitute 2 or 3 thinner parallel wires for 1 thicker wire. This allows us to fit the wire through thinner openings and thinner wire is often easier to bend. When you substitute, you will want to keep the cross sectional area the same or more than the 6 AWG wire.