# Tag Info

### How the current actually flows in a circuit?

The condition to have current between 2 points is to have potential difference between them. No. The potential difference between two points is defined as the work required per unit charge to move ...
• 71.8k
Accepted

### 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 wouldn’t call it unstable, but you are right in so far as, if you had a material with all charges bound in individually overall charge neutral atoms, that material would not be a conductor. For a ...
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### How the current actually flows in a circuit?

A and B are at the same potential so $\Delta V = V_A - V_B = 0$. The resistance of AB section is R = 0 as you stated. Writing the normal $V = I R$ relationship as $$I = \frac{\Delta V}{R}$$ the result ...
• 3,352
1 vote

### About lightning and lightning conductor

Of cause, if the lightning conductor does not work properly, lightning may set your house on fire or at least set the roof on fire ore damage it. But a well build lightning conductor should work to ...
• 6,189
1 vote

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

I think you mean "uniform" not "constant" - "uniform" means unchanging in space whereas "constant" means unchanging in time, which is not necessarily true here. ...
• 53.1k
1 vote
Accepted

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

Well you mentioned in your question already that the electrons will be moving to cancel out an electric field. That means an electric field applied to a metal will cause a current in the metal. I am ...
• 715
1 vote
Accepted

### Why charges reside only on the surface on conductor?

Let's take mole of free electrons in a copper plate, say $d=1$ mm thick. We can estimate the electric field energy by considering the a mole of $+1$ charges separated by $d$ from a mole of electron (...
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1 vote

### Electric field just outside and just inside a current carrying conductor

There are a number of problems here. A steady current in a straight conducting wire produces a surface charge on it. There is no reason a steady current would produce a surface charge on the wire. ...
• 27.6k
1 vote
Accepted

### Relaxation time in conductors

The conductivity in usual metals is high but not infinite. Thus they have a very short (nonzero) dielectric relaxation time, which is the time that any local free electron accumulation in the metal ...
• 16.1k
1 vote

### How the current actually flows in a circuit?

the positive terminal of the battery keeps gulping on the electrons from the wire while the negative terminalkeeps supplying the electrons to the wire. the wire is electrically neutral.
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