Skip to main content

Questions tagged [conductors]

For questions about materials which allow the flow of an electric charge (electrical conductors) or the transfer of heat (thermal conductors) through them.

Filter by
Sorted by
Tagged with
0 votes
2 answers
44 views

Do conductors have bound charges?

In Griffiths, the total charge density of a dielectric is: $\rho$ =$\rho_b +\rho_f$. I have several questions: Can the total charge density of a conductor be written as the equation above? Do the ...
Felix wong's user avatar
-1 votes
0 answers
27 views

What is dielectric constant of conductor if it is connected to battery as the electric field will generate in conductor does it still be infinite? [closed]

as we calculate dielectric constant of conductor saying Eext/Eext-Einduced = 0 but as inside conductor electric field net would be not equal to zero. `
Mayur Namdev's user avatar
0 votes
1 answer
95 views

Will the electrical potential difference between the Windward and Leeward sides of a mountain range generate electrical current?

I would like to know if it is possible that the electrical potential difference between the Windward side and the Leeward side of a mountain range, due to a thunderstorm occurring on the Windward side,...
user57467's user avatar
  • 478
1 vote
3 answers
88 views

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 ...
Anton Bert's user avatar
1 vote
3 answers
41 views

Charge besides conductor

This is a curiosity What would be net charge induced on a (say spherical) conductor when a positive charge is placed besides it. What I think is that a negative charge will be induced on surface near ...
Mainframe's user avatar
1 vote
1 answer
75 views

How do conductors actually work in electrostatics? [closed]

I am mainly confused because we are learning about conductors in electrostatics, and I always think of an electric wire connected to a phone charging it (a phone charger). So, when I hear "...
dareen's user avatar
  • 31
1 vote
1 answer
52 views

Confusion regarding phase

As far as I know about phase if the phase difference between two waves is positive, the former is leading..and the latter is lagging. Then why has D J Grifith stated this? If the phase of the magnetic ...
Suhail Sarwar's user avatar
1 vote
0 answers
51 views

Charge distribution in two concentric conducting shells connected by a thin wire

Above is the content of the problem in the title and I'm confused about the solution. I'm not sure whether it is correct or not. The two shells are conducting and connected, so the difference in ...
Miłosz Brzechczyn's user avatar
0 votes
4 answers
148 views

Why don't positively charged metal ions (in a wire) move but electrons do?

I'm very confused on this question. I've researched online but I can't seem to find the answer anywhere: all I was told was that electrons move (as part of electron flow) towards the regions of high ...
Nadia Nowak's user avatar
-1 votes
2 answers
93 views

Charge conservation in ohmic material - Apparent paradox

Consider an ohmic material with constant conductivity, which obeys the relation: $$\vec J = \sigma \vec E$$ where $\vec J$ is the current density and $\sigma$ is the conductivity. Applying the first ...
Lagrangiano's user avatar
  • 1,616
0 votes
1 answer
43 views

Surface charge density within a parallel plate capacitor on different voltages

I need a way to vary the surface charge density without changing the electric field. My idea is to use two large conducting parallel plates close to each other in vacuum enclosed in a grounded vessel (...
Sibo's user avatar
  • 1
1 vote
1 answer
24 views

Metallic bonds in Copper and Electric field application

Didnt know where to put this since its like a combination of Chemistry and Physics. But in the picture below, we can see that they've defined a metallic bond as essentially the attraction between the ...
Wander verse's user avatar
2 votes
0 answers
73 views

Induced charge on conducting sphere sliced by a plane

We are given a conducting solid sphere, and it is cut by a plane as shown. A charge $Q$ is given to the smaller part of the conductor, and it is required to find the induced charge on the surface of ...
Eisenstein's user avatar
0 votes
1 answer
117 views

Why is the Poynting flux not conserved across the interface between two conducting materials?

This question is part of my attempt to use an answer to another question I've posted on this site. If I have two materials with complex indices of refraction, $\widetilde{n}_0$ and $\widetilde{n}_1$, ...
Roy Smart's user avatar
  • 123
0 votes
1 answer
45 views

Uniqueness of charge distribution in conductor

I found out about a result describing the uniqueness of the charge distribution on a conductor. It says that for a given total charge on a conductor and a given charge distribution of the outside (...
FundamentalTheorem's user avatar
0 votes
3 answers
92 views

How do charges on two conductors charged by the same battery relate to each other?

Let’s consider 2 neutral conducting spheres, L and R, with different radii. There is a battery somewhere in the middle between these spheres. The battery has potential $\phi_{B-}$ on its negative ...
Alexandr's user avatar
6 votes
1 answer
190 views

Accumulated charge in conductors

Conductors placed in electric fields undergo a redistribution of charges. There is a separation of charges which occurs only on the surface. But what prevents the charge from leaving the surface of ...
Users's user avatar
  • 426
1 vote
1 answer
41 views

Gauss's Law vs Image charges

Consider a grounded shell of radius $R$, inside is a point charge $q$ at a distance $a$ from the centre. Now, this charge would induce an amount of charge $-q$ on the conductor, whose field would be ...
Vivek Kalita's user avatar
2 votes
1 answer
123 views

Can aluminum shield magnetic fields?

Say I have built a simple working AC 50 Hz transformer. It has copper coils at each end of a soft iron rod. If I slip an aluminum tube over the soft iron rod, so the copper coils now are over the ...
itsme's user avatar
  • 159
0 votes
1 answer
68 views

A General Analysis of Charge Distribution inside conductors

I'll go ahead and present my question straight-forward and then talk about the calculation details.My Question is: how do you define a conductor in Electrostatics? What are the basic(minimum) set of ...
Charu _Bamble's user avatar
0 votes
0 answers
15 views

Why does charge reside on the outer surface for a conductor but inside in case of an insulator? [duplicate]

So from what I understood, in case of a conductor there are free electrons and when its charged there is maximum repulsion between the like charges which causes the electrons to reside on the surface ...
Suja Harshitha's user avatar
0 votes
3 answers
90 views

Induced charges due to uniform electric field

Suppose there is a finite metallic conductor placed in a uniform electric field. Will the magnitude of positive or negative charge induced on it depend on its shape or will it only depend on the ...
Gautam's user avatar
  • 47
0 votes
2 answers
44 views

Surface charge density in conductors

I was learning about conductors — mainly solid spheres and hollow spheres — and my teacher told me that in the case of solid spheres with a spherical cavity and a charge at the centre of the cavity ...
Kushagra Mishra's user avatar
0 votes
1 answer
53 views

Confusion regarding a statement regarding conductors [duplicate]

While discussing conductors, our lecturer told us that, UNDER ELECTROSTATIC CONDITIONS, electric field is zero in the "meat" of the conductor. Using this assumption (and using Gauss law), ...
Ayanokouji Kiyotaka's user avatar
-1 votes
1 answer
47 views

How do I create a highly conductive vapor cloud? [closed]

I'm working on a project that requires that I create an electrically conductive gas cloud that can conduct voltages as low as 1.5v from a regular double A battery. I've been looking into using mecury ...
TechDroid's user avatar
  • 877
2 votes
0 answers
56 views

Can two positive electric conductors attract each other in some cases?

Can two positive conductors attract each other in some cases? In my opinion, let me denote the two conductors by $Q_1,Q_2>0$. Suppose $Q_1>>Q_2$ and $Q_2$ is really small. Let a tip of $Q_1$ ...
Luosw's user avatar
  • 21
0 votes
1 answer
27 views

Multiple cavities in a conductor and a charge outside [closed]

So I came across this problem: A spherical conductor 'A' contains two spherical cavities as shown in figure. The net charge on conductor itself is zero. However, there is a point charge $q_{1}$ at ...
Frenzy Ripper's user avatar
1 vote
0 answers
26 views

Charge induced on a parallel long plates when one is earthed [closed]

Consider two Long Parallel plates at a distance 'd'. The one on the left has charge Q1 and right plate has charge Q2. Now the right plate is earthed using a conducting wire so the charge on right side ...
Hardik Jain's user avatar
1 vote
1 answer
91 views

What is the potential of a conductor between two eletrically-charged plates?

Let's say I have two plates. One is at +20V, the other is at +10V, and they are separated a meter apart. I place an uncharged conductor that's 10cm wide into the gap between them, 20cm from the plate ...
Allure's user avatar
  • 21.4k
0 votes
2 answers
45 views

It's possible to have different potentials (boundary conditions) in the surface of a cylindrical conductor?

Edit I realized that my problem is not clearly stated. In general, I can solve the Laplace equation for boundary conditions $V(r,\phi, z=0) = f(r,\phi)$ (bottom of the cylinder), $V(r,\phi, z=L) = g(r,...
kurush's user avatar
  • 3
0 votes
0 answers
10 views

Force on a charge inside a conductor in presence of external electric field

It is known that electric field inside the conductor in electrostatics is zero. Now, if I a place a charge (let the charge be q) anywhere inside a charged spherical shell (let the charge be Q) which ...
Anonymous's user avatar
3 votes
2 answers
203 views

Direct Current through a Copper Tube - Magnetic Field Question

Passing direct current through a straight copper wire generates the familiar "nested" cylinders of magnetic field strength along the length of the wire, decreasing in strength with distance. ...
GravityTim's user avatar
1 vote
1 answer
40 views

Confusion about EM waves in a conductor, AC in wires, and skin effect

I am trying to get my head around these different points: From Maxwell's equations we find that an electromagnetic wave in a conductor decays in amplitude with a characteristic length of about 1 cm in ...
user655870's user avatar
0 votes
1 answer
30 views

Apparent contradiction while calculating potential inside shell due to off center charge

Consider the following scenerio$-$ A point charge $Q$ is placed at an off center point $B$ in a spherical shell made out of a conducting material. We are required to find the potential at the center. ...
Eisenstein's user avatar
0 votes
0 answers
36 views

Maximum mean distance electrons can travel in ballistic conduction?

How far in mean distance can electrons reasonably travel via ballistic conduction according to the current model and what is the current mean or average distance or length record for ballistic ...
ProfessorMoreRight's user avatar
0 votes
0 answers
24 views

If someone moves with a velocity $v$, relative to a conductor carrying current $I$, will the current change with respect to the observer?

If someone moves with a velocity $v$, relative to a conductor carrying current $I$, will the current change with respect to the observer? I feel that the drift velocity of current is independent of ...
Maths lover's user avatar
0 votes
1 answer
15 views

Potential of a conductor when the charge distribution is uneven due to induction

If a negatively charged object is brought near a neutral conductor, there would be an excess of positive charges on the side of the conductor near the charged object, while there would be an excess of ...
ZZZ's user avatar
  • 37
0 votes
1 answer
83 views

What is the difference between conducting and non-conducting shells in electrostatics?

I've been taught electric field lines do not exist inside the volume of the conductor. An internal field is created inside its volume which cancels the external field, hence suggesting the net charge ...
Mel's user avatar
  • 133
0 votes
2 answers
47 views

Charge transfer between connected conductors

My book says that "When one conductor is kept inside other conductor and connected, complete charge transfer takes place." I know that their potential would be the same but why does ...
Manvendra Singh Gehlot's user avatar
0 votes
3 answers
83 views

About lightning and lightning conductor

Lightning not only strikes on a lightning conductor installed on the building... Lightning can strike anywhere on the surface roof of the building even though that building has installed a lightning ...
Nandy's user avatar
  • 31
0 votes
1 answer
25 views

Will the potential on surface of a irregular conducting sphere surface be constant?

We know that potential on surface due to a regular conducting sphere is constant. But what will it be when the surface is irregular and charge distribution is non-uniform?
Utkarsh Maddheshiya's user avatar
2 votes
2 answers
85 views

How could free electrons flow in a conductor? If electrons actually flow in a conductor, then won't the atoms of the conductor become unstable?

I've read in many physics books that electrons flow due to a potential difference across a conductor, and that the flow of electrons is opposite to the current direction. But, if electrons move from ...
Doodieman360's user avatar
0 votes
1 answer
58 views

If metals can’t sustain an electric field inside them (as their electrons move to cancel it out), how do they still conduct electricity? [duplicate]

I tried to understand by my own couldn't do so.
Aarav Raj's user avatar
  • 103
0 votes
1 answer
215 views

Magnetic field due to a conducting spherical shell connected to two wires

A conducting spherical shell of radius $R$ is connected to two perpendicular long wires, as shown in the figure. A current $I$ flows through the system, and the current flows in such a way that no ...
davidaddisonsenjaya's user avatar
0 votes
1 answer
65 views

Why charges reside only on the surface on conductor?

I wonder why charges reside only on the surface on conductor? And I read this question and the answer to it: Why charges reside on the surface on conductor? https://physics.stackexchange.com/a/210634/...
佐武五郎's user avatar
0 votes
0 answers
15 views

Why charges gets accumulated at pointy edge of a conductor, why don't they distributed uniformly due to repulsion between them [duplicate]

Consider a conductor which have unsymmetrical shape as shown in the figure. Initially the conductor is neutral. Then I give some external charge to it. I know charge will get distributed on the ...
Dinesh Katoch's user avatar
0 votes
1 answer
80 views

Electric field just outside and just inside a current carrying conductor

While solving a problem related to electric fields I came across a conclusion in the solution that, for a "straight, steady current carrying conducting wire" having current $I$, so that the ...
SHINU_MADE's user avatar
3 votes
0 answers
64 views

Can cell phones send message in the elevator?

From Gauss's theorem, a closed, hollow conductor shields its interior from fields due to charges outside, but does not shield its exterior from the fields due to charges placed inside it. So my ...
Yuan Fang's user avatar
  • 275
0 votes
1 answer
68 views

Relaxation time in conductors [closed]

according to a crude (classical) model of the drift velocity as given in my high school textbook, using an example of cylindrical conductor, we derived ohm's law as $j=\sigma E$ where $\sigma $ is the ...
tensorman666's user avatar
2 votes
3 answers
185 views

How the current actually flows in a circuit?

I'm studying about electricity and i'm quite lost. Given the circuit in the picture, I just want to know how the current flows through the points A, B, C, D. The condition to have current between 2 ...
InTheSearchForKnowledge's user avatar

1
2 3 4 5
28