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Questions tagged [voltage]

Voltage is the unit of measurement for electronic potential, from one point location to another.

Voltage can be described as a specific energy per electron in location "A" minus that of location "B", resulting in units Joules per Coulomb. This is the potential energy that could be produced if electron(s) moves from "A" to "B".

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How much "earth" does it take to create an "earth ground" for measuring voltage?

I was contemplating the idea of a multi-meter that had a "built in" Earth ground to it, and if it did have this ability how much earth/dirt would it take to register as a true Earth ground to register voltage of 120v when touching a standard…
Tony DiNitto
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What is voltage?

I am a little unclear on what voltage actually is and I am trying to find out what the physical cause for voltage is. Is it the speed of the electrons through the conductor or is it an excess of electrons on the supply side of the conductor. I…
Brian2263
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Why is the induced voltage due to the current of the phase conductor wrapped around the shield not included in the inducedvoltage calculation formula?

Why is the induced voltage due to the current of the phase conductor wrapped around the shield not included in the voltage calculation formula induced by the shield/sheath in the three-phase coaxial cable? As shown in the equation below, the voltage…
Anthony Williams
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What is the voltage induced on the outer shield/sheath by the current of the inner phase conductor in a concentric cable?

What is the voltage induced on the outer shield/sheath by the current of the inner phase conductor in a concentric cable? The radius of the inner phase conductor is r, the distance from the center of the phase conductor to the shield/sheath is d,…
Anthony Williams
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anodized insulation and its use as dielectric

I've done anodizing before, but I had some questions regarding the anodized insulation and its use as dielectric. For example, if I want to tolerate a 1000 volt electrical failure do I have to do anodizing with a thousand volts or, for example, with…
user296115
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Voltage Transformation Efficiency

Is the power loss during the stepping up / down of voltages, in transformers, comparable to that of raw current running through cross-country wires? How much energy is saved?
Tobi
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Voltage produced in transformer

The voltage produced in the turns of the coil in a transformer is given by (Faradys law): $$\epsilon\left(t\right)=\text{n}\times\phi'\left(t\right)\space\left[\text{V}\right]\tag1$$ Where $\text{n}$ is the number of turns of the coil and $\phi$ is…
asxasdas
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Does voltage drop occur with zero load and zero resistance

Imagine a circuit consisting of just a battery and conducting wires which have zero dissipativity so that there is no loss of energy( Zero resistance). If the wires are connected to both terminals the current will flow in the direction of lower…
Viham G
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What exaclty is voltage?

I'm 15 and I recently got into electronics and I'm just having trouble understanding what voltage is I've visited multiple difference websites and they all say different things. Some people say that i'ts the strength of the electric field created…
user272011
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If voltage is distance dependent then why we say battery have a voltage without knowing distant between anode and cathode?

I learnt from my Physics class that voltage = integral of E*dl, which clearly indicates that voltage is distance dependent. But why do we say that a battery has a fixed voltage? Won't a battery's voltage vary depending on the length of the wire…
user3489985
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Same Voltage and Resistance, different Lethality

"It is easy to produce a potential difference of several thousand volts between your body and the floor by scuffing your shoes across a nylon carpet. When you touch a metal doorknob, you get a mild shock. Yet contact with a power line of comparable…
OverLordGoldDragon
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Link between potential difference and voltage

Voltage in a radial electric field is given by kQ/r (where k=1/(4*pi*epsilom.0)). Voltage in a circuit is given by IR, so if R=0 there is no change in voltage for an electron flowing through the circuit, (V=0). However in a vacuum, if you had just 2…
user294388
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Energy, Voltage Drop, and Current

In an electrical circuit consisting of just a source and some load, when current hits the load, the voltage drops. This means that the potential energy of the charge drops. If the potential energy drops, should the kinetic energy of the charge…
DWade64
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Instantaneous Voltage of Generator / Radian / Angular Frequency Question Lack of Understanding

I'm training to be an electrician and am struggling to understand this formula any help would be appreciated. The formula is $V_s = V_0\sin(\omega t)$ I believe this is the formula for instantaneous voltage of a generator Now from my understanding…
BrodyLearnsJS
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When measuring voltages across a resistor Vab != Va - Vb

Why is measuring a voltage drop across a resistor different than when measuring the voltage before and after and subtracting them? it seemed to be around 5%, is this just random error?
teepers
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