Questions tagged [voltage]
Voltage is the unit of measurement for electronic potential, from one point location to another.
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Electrostatic potential outside of a charged ball [closed]
To preface, I have never solved Maxwell's equation or his resulting Poisson's equation in any coordinate scheme, nor am I a physics major. I'm entirely teaching myself how to do this, so I don't know ...
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Does the geometric shape of the cross-section of an infinitesimally thin conducting charged thread (wire) affect its electric field?
Assume that a solid conducting torus (toroidal ring), with a cross-section of a circle of (minor) radius $r$, is negatively charged. Solving Poisson's equation, we can find the charge distribution of ...
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Why do lamps in circuit have potential difference but two points in cable without anything in the middle of it have no potential difference?
I'm preparing for my EE major, this is my starting point.
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Visualization of resistance [closed]
What does a resistor do in an electrical circuit? Does it impede the flow of electrons by increasing offering a path that offers a large no. of collisions? How can i visualise it, i have been told to ...
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Voltage: work to move a charge, or difference of electric potential?
Let's say I have a single positive charge inside of an electrostatic field. I want to move this charge from point A to point B and determine the voltage between the two points.
Points A and B are the ...
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Why is my idea of voltage drop wrong?
when battery is connected to 2 ends of a wire, potential difference is created, this causes electric field causing electrons to move, the field gives the electron electric potential and the thus ...
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Understand power rating in layman terms
I have recently started the chapter of electricity of class 8. I am not understanding the concept of power rating of appliances. When we say that a bulb is rated 220V-100W, which means, according to ...
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Maxwell stress tensor on a capacitor late given a dielectric
Given a capacitor with large plates (area $A$) separated by a dielectric with relative permittivity $\varepsilon_r$ and thickness $g$, I believe the Maxwell stress tensor states that the force on each ...
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Equivalent capacitance for a system of spherical capacitors
The question demands equivalent capacitance of two concentric metallic shells with larger and smaller radii. b and a respectively. The inner sphere is just left open(it's not earthed or anything), and ...
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How do I compute the voltage accross a cell membrane given microstate of neuron (distribution of charged ions)?
I am not a physicist, and I'm not sure what keywords to use to search for this.
I'm trying to understand how I could in theory quantitatively know, what the voltage across a cell membrane in a Neuron ...
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Potential difference when two emf sources are connected in a simple loop circuit
I am having difficulty understanding the equation below for the potential difference between the two terminals of an electromotive source when two sources are connected from Sear and Zemansky's ...
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Why is the electric potential from a positive sphere not negative? [duplicate]
Say we have a positive point charge located somewhere. Then the electric field due to this point charge is
$\vec{E} = \frac{1}{4\pi \epsilon_0}\frac{Q}{r^2}\hat{r} $ , now considering potential is $V =...
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Maximum voltage that a system of two capacitor withstands when connected in series [closed]
Question:
A capacitor of capacitance 1 micro faraday withstands the maximum voltage 6kV while a capacitor of 2 micro faraday withstands the maximum voltage 4kV. What maximum voltage will the system ...
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Does cutting out the surfaces with no surface charge affect the charge distribution on the remaining parts of a conducting surface of arbitrary shape?
Assume that we have an arbitrary conducting surface being charged positively/negatively. Also, assume that we have extracted charge distribution by solving the Poisson's equation with proper boundary ...
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Can resistors having equal magnitudes of potential difference be considered to be in parallel?
More specifically, if potential difference across a resistor, is exactly negative of the potential difference across another resistor, can they be considered to be in parallel? If so, why?
Can the ...
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