In electromagnetism, the electromagnetic tensor or electromagnetic field tensor (sometimes called the field strength tensor, Faraday tensor or Maxwell bivector) is a mathematical object that describes the electromagnetic field in spacetime. The field tensor was first used after the four-dimensional tensor formulation of special relativity was introduced by Hermann Minkowski. The tensor allows related physical laws to be written very concisely.
== Definition ==
The electromagnetic tensor, conventionally labelled F, is defined as the exterior derivative of the electromagnetic four-potential, A,...
In physics, the Lorentz transformations are a one-parameter family of linear transformations from a coordinate frame in spacetime to another frame that moves at a constant velocity (the parameter) relative to the former. The respective inverse transformation is then parametrized by the negative of this velocity. The transformations are named after the Dutch physicist Hendrik Lorentz.
The most common form of the transformation, parametrized by the real constant
v
,
{\displaystyle v,}
representing a velocity confined to the x-direction, is expressed...
The mathematical proof is provided by the accepted answer. This will be an intuitive way to explain why the net force on an arbitrarily shaped closed loop, exerted by a uniform magnetic field, is zero.
I hope the reader must have come across the following formula:
$$d\vec{F}=i(d\vec l\times \ve...
Currently, moderators can kick users out of a room. I've done this to two users now, and they just come right back into the room. I conclude that it's not effective for its presumed purpose (slowing down trolls or other troublemakers, on a room-specific basis).
I propose that a delay be impose...
