# Questions tagged [charge]

A fundamental property of matter which causes it to experience electromagnetic forces.

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### What electric field will be generated by a magnet rotating around a center with radius $R$? What will be electric field at center?

Lets say there is a charged particle at the center and magnet is rotating around it with radius R facing its north pole towards the charge. What will be electric field at the charge and what force the ...
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### Do vacuum virtual patricles have mass? [duplicate]

When a particle and antiparticle pair is produced their charge sum is zero,momentum sum is zero but the mass sum isn't.Does that mean that possibly for the mass there is no need of starting ...
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### Electric charge on a capacitor [closed]

What is the electric charge on the capacitor with 3μF? I've tried to apply Kirchhoff voltage law on each mesh, but isn't there any short procedure for it? Many thanks in advance.
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### What is surface bound charge? [closed]

what is surface bound charge ? how to calculate it?
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### What is the maximum charge a conductor can hold? [closed]

My question goes: what is the maximum charge a conductor ball with 15cm radius sitting in air can hold?
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### Why is energy absorbed by the battery when the plates of a parallel plate capacitor are pulled apart?

It is said that when the plates of a parallel plate capacitor connected to a battery are pulled apart to increase the separation, energy is absorbed by the battery and no heat is produced during this ...
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### Does electric charge vary between observers?

I understand that certain observations such a length and mass vary depending on observers in different frames of motion and gravity. I was wondering if the electric charge changes in a similar way. ...
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### What does the interaction between two charges depend on?

In our intro to electrodynamics course, we were told that the interaction between two charges depends on: ➢Magnitude of the charges ➢Separation distance between the charges ➢Velocities of the ...
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### How can I prove that the Noether charge represents actually conservation of electric charge?

I have a question about Noether's theorem for global gauge invariance of a complex scalar field. Starting from \begin{equation} \mathscr{L} = \partial_{\mu}\Phi \partial^{\mu}\Phi^{*} + \frac{m^2c^2}{...
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### Sphere, dielectrics and bound charge

I have this situation. A conducting metal sphere of radius $a$ and charge $Q$, surrounded by a dieletric shell with inner radius $a$ and outern radius $b$. If I try to evaluate the induced charge ...
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### What do we mean by charge in physics?

I am drawing the comparison between electrical charge and colour charge, in electric charges they communicate with (virtual) photon and photon itself is a boson carrying no charge. How about colour ...
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### Finding the direction angle of an electrostatic force [closed]

I am given two points: q1=5.8×10-9 C at (0.0022 m, 0), and q3=4.1×10-9 C at (0,0). I have already found the force on q3 by q1 to be .044 N, but now I need to find the direction angle of the force on ...
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### Can particle with fractional charge exist in isolation?

Since quarks are ruled out I wonder if it is possible for free fractional charge to exist not counting virtual particles?
39 views

### What is the relationship between charge and mass of electrons and protons? [closed]

Proton and electron have equal and opposite charge but they have a different mass how is this possible
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### How to know charge of a particle from position and momentum?

It was mentioned in one documentary that the only think we need to know about a particle is it's position and momentum, so we can calculate every other quantity from this. If it is correct how do we ...
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