All Questions
Tagged with resistance conductors
16
questions
1
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1
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80
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When the depth of a conductor is sufficiently large, is the reactance equal to the resistance? [closed]
Is the reactance in a conductor approximately equal to the resistance in a conductor when the depth is very large?
If so, why?
I'm struggling to understand the concepts behind this. I believe it has ...
- 57
2
votes
0
answers
114
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Finding resistance between two conductors
For my electromagnetic-field class we are asked to calculate resistance between two electrodes shown as below.
The part c(i) is just a simple resistance question using the formula R=pl/a.
I don't ...
- 21
0
votes
1
answer
2k
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Negative to chassis or separate wire?
In automotive applications typically battery negative is connected to the chassis, right. This makes the chassis be at the same potential as battery negative, but when completing a circuit, ultimately ...
- 930
0
votes
1
answer
284
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Resistance vs capacitance of conductor
Suppose we have a wire which transmits power. Is there a direct relationship between the resitance (or conductance) of the wire/m and the capacitance of the wire/m? Or they are independent of each ...
- 491
0
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1
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207
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Using nichrome as a conductor?
Can we use nichrome as a conductor by connecting it in parallel with a small resistor such as 1 ohm resistor to lower its resistance?
- 11
1
vote
1
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5k
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stranded wire resistance compared to solid wire
Why is it that a stranded wire has higher resistance than a solid wire?
Although the area of the stranded is more which means more skin?
""The resistance of the stranded conductor is ...
- 883
0
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2
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4k
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Derivation of formula for temperature coefficient of resistance
https://www.electrical4u.com/temperature-coefficient-of-resistance/
Referring to this article, I'd like to compile two key formulas for the temperature coefficient of resistance.
First is the formula ...
- 469
1
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3
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5k
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Derivation of resistance of coaxial cable
As given here, the derivation of Resistance for Coaxial Cables
Consider a coaxial cable of length \$L\$, consisting of a cylindrical conductor of radius a surrounded by a cylindrical conducting shell ...
- 469
8
votes
9
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12k
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Resistance of wire
I am currently studying Practical Electronics for Inventors, Fourth Edition, by Scherz and Monk. Chapter 2.5.1 How the Shape of a Conductor Affects Resistance says the following:
The resistance of a ...
- 1,281
1
vote
7
answers
1k
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Two short circuits
I wanted to ask a concept but couldn't guess how to explain so I'm taking help from this example. This is not a homework problem.
Now my doubt is all the current will go through the horizontal ...
- 13
3
votes
4
answers
3k
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Electrical resistance of two conductors of equal surface area in contact with another?
Resistance of a wire can be determined by the formula R = resistivity*(length/area). What if you have a wire composed of two parallel metals that are in contact with one another? Will the resistivity ...
- 175
1
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2
answers
2k
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Why do soldering guns use copper as a heating element?
According to Wikipedia;
The body of the tool contains a transformer with a primary winding connected to mains electricity when the trigger is pressed, and a single-turn secondary winding of thick ...
- 443
1
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1
answer
1k
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Typical resistances of jumper wire and silver foil
What is the typical resistances of the following or how can I go about calculating this approximately?
1) Typical jumper wires used in prototyping with breadboards
2) a silver foil with dimensions ...
- 59
15
votes
4
answers
4k
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How can I ensure low-resistance ground contacts to an aluminum enclosure?
I am building an electronics project with an aluminum enclosure. I need to ground it—and very well—for human safety. (The system handles 300 A of current, and I want to be sure that if there is an ...
- 497
38
votes
7
answers
9k
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Using a bottle of water as a resistor
Today, while drinking some water from a \$500mL\$ bottle, I started reading the info about the water and found out that the conductivity (\$\sigma\$) at \$25°\$C is \$147.9\mu S/cm\$. So it came to my ...
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