# Tag Info

Accepted

### 3 Aspects of Voltage that contradict each other

Basically the problem here is using the same words for similar and related concepts that are nonetheless not identical. The fundamental concept that is behind "voltage" is the concept of ...
• 2,367
Accepted

### Double and single delta-function potential well energy similarity

As the two delta peaks are pulled apart, they influence each other less and less. In the limit $a \to \infty$, the bound state energies are completely determined by the bound state energies of a ...
• 6,990

### 3 Aspects of Voltage that contradict each other

1- Voltage is Potential Difference: Voltage is the difference between the energy levels. The potential difference between two points is the work required per unit charge to move the charge between ...
• 75.7k

### Why many times $E= -{\rm grad} V$ does not give correct direction of the $E$?

This is my answer to your original question. I'm afraid that you go wrong very near the beginning of your question. In your first paragraph you ask us to "consider two points, one on positive 𝑧 ...
• 36.2k

### Why is charge on a conductor stable?

Yes that's right, for a charged conductor the electric field outside the surface is directed such as to pull charge off the surface. The reason the charge doesn't leave the surface is to do with what ...
• 60.1k
Accepted

### Electric Potential simple questions

How can a P charge can move even though it has zero potential? Because the force is not determined by the value of the potential. The force is determined by the slope of the potential. Because a ...
• 22.4k