# Two conducting spheres connected by a wire

By J.P. Mizrahi | Electricity and Magnetism

In the present post, we calculate the dependence on time of the charges on two conducting spheres connected by a wire until reaching the electrostatic equilibrium.

# The physics behind grounding a conductor

By J.P. Mizrahi | Electricity and Magnetism

We were taught that grounding a conductor (by connecting it to the ground with a wire) means fixing its electric potential to zero. That’s right, but what is the physical mechanism that fixes to zero the electric potential? Let’s see how grounding a conductor works in physical terms.

# The method of images in electrostatic explained as never before

By J.P. Mizrahi | Electricity and Magnetism

When I was a student, I remember they taught me that the method of images to solve the problem of finding the electrostatic potential outside a grounded conducting sphere in the presence of an external point charge is a kind of miracle. But in physics, there are not miracles. Here are the facts why the method works

# Maxwell equations in matter

By J.P. Mizrahi | Electricity and Magnetism

The Maxwell equations are a set of four partial differential equations that describe the spatial and temporal behavior of electric $$\vec{E}$$ and magnetic $$\vec{B}$$ fields. The sources of time-independent electric and magnetic fields are the time-independent electric charge density $$\rho$$ and the steady current density $$\vec{J}$$ respectively.

# The electric field of a point charge surrounded by a thick spherical shell

By J.P. Mizrahi | Electricity and Magnetism

In the present post I will consider the problem of calculating the electric field due to a point charge $$Q$$ surrounded by a conductor which has the form of a thick spherical shell

# Applications of the Gauss law to electrostatic

By J.P. Mizrahi | Electricity and Magnetism

I will start with some conventional problems which are relatively easy, and after that, I will consider more advanced problems. I will show you how to solve some problems that seem to be challenging.

# Electric dipole and electric dipole potential. An introduction.

By J.P. Mizrahi | Electricity and Magnetism

The concepts of electric dipole, potential of dipole, pure and physical dipoles are explained.

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