# Questions tagged [potential]

Scalar and vector potentials in electromagnetism. The scalar potential is potential energy per unit charge. For potential energy, use the [potential-energy] tag.

2,983 questions
Filter by
Sorted by
Tagged with
57 views

### Empirical equivalence of shifted chemical potential $\mu_i$

It is often said that, in classical thermodynamics, entropy $S$ and energy $U$ are defined only up to an additive constant proportional to the total amount of substance $N=\sum_i N_i$ (where the sum ...
29 views

### Tensor/Vector decomposition/representation & DOF arguement [closed]

In fluid mechanics, for irrotational flow it is sometimes useful to present the velocity, $U$ in terms of a scalar potential $\Phi$ as: $$\vec{U}=\nabla \phi$$ $\vec{U}$ has 3 dof. $\phi$ has 1. Why ...
48 views

### The vector potential of a (rigid) electron beam

I am reading Xiujie Deng, Theoretical and Experimental Studies on Steady-state Microbunching. I am trying to figure out how Equation (4.1) regarding the electrodynamic vector potential is derived. I ...
22 views

### In the formula of capacitance of a conductor the $V$ is potential of conductor once fully charged or initial potential of conductor used to charge it

capacitance $C=q/V$ The $V$ here is the final potential of the conductor which is to be charged or the initial potential of the source conductor? We are not charging it by using a battery rather ...
25 views

### Effects on net Electric Potential with the insertion of a dielectric into a network of two capacitors in series?

Suppose you have a circuit with two capacitors of equal capacitance C, C1 and C2 that remain connected to a battery at all times. A dielectric is then fully inserted between the plates of C1. What, if ...
1 vote
134 views
+50

### Gravitational potential energy of a galaxy

How can the total gravitational potential energy of a galaxy be calculated? Lets assume for simplicity that the entire galaxy follows an exponential mass density function for an infinitely small ...
41 views

1 vote
46 views

### Does electric potential give electron mass as same as higgs field?

Inside negatively charged ball there is constant electric potential. If electron will be placed inside ball with constants potential will it give mass from electric potential as same as higgs field ...
52 views

### Reference point of potential in case of a battery

When we define electric potential of a charge,we need to take a charged body as a reference and then we bring the test charge to calculate the electric potential. Now,electric potential energy is ...
1 vote
92 views

50 views

### Does KVL don't hold in pn junction reverse bias?

Does KVL hold in pn junction reverse bias because any reference about semiconductor physics provide that figure if we apply KVL around the loop won't be zero it will be equal to $V_{bi}$ then how KVL ...
18 views

### Why Does equipotential surfaces gets father apart in the regions of weak electric field?

If we consider a charge in space then we can draw infinite number of spheres (taking the distance between the spheres equal) around the charge and these spheres act as equipotential surfaces. Now, As ...
1 vote
26 views

### Does the built-in potential inside a diode change by making bias?

under thermal equilibrium the pn junction have a built-in field let say it's $E_{1}$ , if we make a reverse bias the external battery provide a permanent field $E_{2}$ , so the total field inside the ...
59 views

### Violation of energy conservation due to Lorentz Force?

We know that work done by Lorentz Force $q(\vec{v}\times\vec{B})$ is $0$ on moving charge in magnetic field as velocity is always perpendicular to the force. This means that kinetic energy remains ...
35 views

### Does negative charge move from lower potential to higher potential?

This image implies that charge flows from a higher potential to lower potential….but if we attack a battery to a circuit then the current will flow from lower potential (positive terminal) to higher ...
1 vote
19 views

### Difference between local and non-local optical model potential?

As far as I understand, local OMP (optical model potential) depends only on the relative position, and non-local OMP depends on relative position and momentum. I am searching for more information so ...
51 views

### Relation between ground state energy and the potential

I am given the following Hamiltonian: $$H = \frac{p^2}{2m} + \lambda|x|^3$$ where $\lambda$ is a positive constant. Is there a relation between the ground state energy of $H$ and $\lambda$ i.e. is ...
31 views

### EMF Generated according to Faraday's Law

According to Faraday's Law, due to a relative movement between the current carrying loop and the magnetic field, an EMF is induced in the loop causing a current flow. However, according to Maxwell-...
27 views

### Potential Difference and Electrical Potential [duplicate]

What is the difference between Electrical Potential and Potential Difference? Please try to explain in layman language Any response would be apriciated
2k views

### Is the magnetic vector potential "real" in classical electromagnetism?

From how I've learned it in school the magnetic vector potential is used as a mathematical tool to simplify problems with current-carrying wires in classical electromagnetism, but is never treated as ...
51 views

### Trouble understanding the electrostatic field's curl [duplicate]

I'm going over Griffiths Electromagnetism, and I've encountered a sort of proof about why we can state an electrostatic field is conservative, using Stokes' theorem. Of course, I do understand if you ...
12 views

### Potential inside a Charged Conductor near another Charge

Let's say that we have a solid conducting sphere with radius r and this conductor is given a positive charge of q1. We know that the charge will get distributed on the surface to reduce field inside ...