
Reconciling $Q=PR$ and $Q=vA$ - Physics Stack Exchange
Jan 9, 2016 · Say we have a closed loop system, where the flow Q Q is constant through a pipe. Then, at one segment of the pipe, we make the radius smaller. This causes the resistance R R …
What is the meaning of external work in electric potential?
Apr 1, 2022 · In the context of your question, "W = q (Va-Vb)" the "work" there refers to an external agent applying forces (to balance the electrostatic force... so that the displacement is …
Current equation $I=nqA\\vec{v}_d$ - Physics Stack Exchange
May 2, 2020 · I am not sure exactly what your problem is. n n is typically an charge carrier density, so the number of free charges dN d N in your volume would be dN = ndV = nAvddt d …
How does one mathematically derive the damping coefficient of a ...
Sep 19, 2018 · I am very well aware of how to get the damping coefficient experimentally by observing a system in action. Given the dimensions and fluid properties of a theoretical …
Force on a point charge $q$ inside a cavity in an uncharged …
This is problem 2.40 from Introduction to Electrodynamics by D. J. Griffiths: A point charge q q is inside a cavity (not necessarily spherical or anything similarly regular) in an uncharged …
electromagnetism - Relation between magnetic moment and …
May 15, 2015 · How do I prove the relation between the vectors of magnetic moment $\vec\mu$ and angular momentum $\vec L$, $$\vec\mu=\gamma\vec L$$ ? Many text books and lecture …
Why my formulary says $KE=qV$? - Physics Stack Exchange
Nov 1, 2020 · If you are asking why Ek E k should not be 12qV 1 2 q V then the answer is that by definition, kinetic energy is 1 2mv2 1 2 m v 2 and is equal to the potential energy qV q V stored …
A simple derivation of the Centripetal Acceleration Formula?
Jul 12, 2015 · Could someone show me a simple and intuitive derivation of the Centripetal Acceleration Formula a = v2 / r, preferably one that does not involve calculus or advanced …
electrostatics - Definition of Voltage using integral: minus sign ...
So I'm studying electrostatics and I came across to two different definitions of potential difference/voltage (because we're in stationary regimes) and I'm having trouble understanding …
electrostatics - Voltage: work to move a charge, or difference of ...
Jul 3, 2024 · it will take work to move the positive charge from point A to point B, as I must counteract the vertical component of the electric force and so on. You are quite correct that the …