# Questions tagged [conductors]

A conductor is an object or type of material which permits the flow of electric charges

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### Why is the potential drop across a perfect conducting wire zero?

The reason I feel this isn't right is V=-dE/dr so, when there is an electric field in the wire, there is a potential drop across it too, however, I've been taught that the potential drop for an ideal ...
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### Converging Electric Fields on Metal Plate

I have a question, but I'm not a trained engineer, just curious. So bear with me on my explanation. Let's say I have a metal plate. I have DC power supply and I connect the positive electrode on one ...
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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 ...
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### What does it mean to assign a conductor?

I am reading about SATA power here. They say the following: The power cables for the SATA interface are of similar construction as the signal cables, but have 15 conductors. They supply power to the ...
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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 ...
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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?
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### Charging by electrostatic induction in a new way. Will it work? Instead of connection to Earth I am connecting to another conductor

I am adding the figure of a conventional setup for electrostatic induction. The drawn setup on paper is the special setup. If you don't want to read whole description then just read the summary. ...
1 vote
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### How can a conductor have voltage without charge on it? Taking in electrostatics [closed]

What does it mean if the potential of a conductor is Kq/r which is at r distance from the charge q? How can a conductor having no real charge have some potential (which is here KQ/r)?
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### Any idea if a 2/0 3C teck cable will have fitment issues through a 1-1/2" Metal LB?

I need to feed a 45 kVA transformer and I need to use an LB to pull the conductors through. Will I have issues with the bend radius of the 2/0 conductors? It's a 3C cable. the conduit is 1-1/2" ...
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### Does current flow from earth connected conductor in uniform electric field?

If we place a conductor inside of uniform external electric field then opposite charges will get induced on the both sides of conductor. What if we connect two earth wire to each side, will continuous ...
56 views

### How do I size conductors to a three-phase induction motor to account for voltage drop?

Suppose I have a 480-volt nominal electrical distribution system, and a 460-volt nominal motor. Assuming +-5% variation in the source, it could get down to 456 VAC. I've seen references to motors ...
67 views

### Voltage drop calculation

The impedance of a single phase load with a supply voltage of 120 Volts AC is 2.80+j2.076Ω. The load draws 30 amps at 85% lagging power factor. Determine the size of the conductor used to supply power ...
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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 ...
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### PDN Analysis of PCB - Max Conductor Current Density and Max Via Current Density

I just started using the PDN Analyzer tool of Altium and am getting acquainted with it right now. While the tool with its visualization windows is quite useful, I am confused about what values of ...
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### Calculating field due to induced charges at exterior of conductor

We have an arbitrary hollow shaped conductor, with small thickness. Suppose we place a charge q at any arbitrary location within the hollow shaped conductor. By Gauss's law there will be a total ...
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### the actual no. of diameter of stranded conductor

I have ordered a .G.C. CU. COND. 3 CORE XLPE/SWA/PVC 50mm² 11K.V. ( no.of diameter of wire before stranding 7/3.02) but unfortunately I received (no. of diameter of wire after stranding 7/2.754) after ...
1 vote
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### Why can't conductors be used in making ICs (integrated circuits) instead of semiconductors? [closed]

I really wanted to ask why we can not control flow of electrons in conductors. Can I not say if a current is flowing in a conductor it is 1 and when I disconnect the supply it is 0. Can you elaborate ...
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1 vote
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### Phase difference between electric and magnetic fields of EM wave in a conductor?

When an EM wave travels inside a conductor , we see that there is a phase difference between the Electric and magnetic fields within the conductor. The magnetic field lags behind the E field and this ...
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### Counteract joule-heating

I've got a project where I have an intricate structure made of fine wire, through which a comparatively large current will be sent. Unfortunately, the conductor itself respons poorly to heat, and if ...
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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 ...
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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 ...
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### Charge on parralel cylindrical conductors with reverse current

Suppose one has two parralel cylindrical conductors with a distance $d$ and an radius of $\rho$ while $\rho \ll d$. The currents through the conductors are reverse, but the absolute current is ...
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### Is there a name for this type of connection? [closed]

I can't think of a time when I've encountered this, but I think that this is a thing: you have two conductive paths that, when connected, become one path. How they become connected is through tension/...
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