Recent content by warrenchu000

This also illustrates why a magnetic field does no work (the force and velocity are perpendicular; it can only deflect a particle). Work is a scalar quantity; it cannot be changed from a change in inertial frames, as can be with B. ****** If a theory is a house, the equations are the bricks...

I have resolved my issue: The force on a particle from a magnetic field is qv X B - in a direction perpendicular to both v and B. That direction is radially towards the wire, which can be explained as a current-induced magnetic field in the frame of the stationary charge or as a...

Forget this forum. Just a lot of mumbo-jumbo answers. I don't need to defend myself about my background. I've gone through all the derivations in my old E&M textbooks (Corson & Lorrain, Jackson, Griffiths) but found no satisfactory answers. Yet. Good bye.

A negative argument does not shed any light why it is so - I know what Oerstedt's experiment shows. The symmetry argument was not clear what was the point - that pseudovectors can be physically changed 90 degrees? That a charged particle can get pushed away in one frame while circling around a...

That's even more of an useless answer. You need to interpret the equations in a physical way.

Statement: The magnetic field around a straight wire carrying a current can be explained Relativistically by changing the inertial frame of reference to the frame of the moving electrons - i.e., a Lorentz contraction of the positive charges in the wire will give a denser concentration of the...

My apologies to everyone. I was wrong. The above description is indeed the Coriolis effect, including the atmospheric effect. Thanks to those who made me realize my error.

No. The artillery shell going south would drift to towards east.

The deflection of artillery shells is due to the Coriolis effect. They are deflected to the east when aimed south. This would be like winds in a high pressure center blowing in a counter-clockwise direction - which they do not.

In the northern hemisphere, they rotate counter-clockwise. In the southern hemisphere, they rotate clockwise. This is often attributed to the Coriolis effect, an apparent deflection of moving objects in a rotating frame of reference. While this is true for deflected artillery shells, it is NOT...

B-mode polarization is a group of linear polarizations arranged in a pinwheel pattern. It is not the same as circular polarization.

I believe I have the answer. B = mu0 * N * I / l is for the INSIDE of a solenoid far from the ends. B = mu0 * N * I / (2a) is for a stack of loops on the END POINT of the stack. Ampere's law was used to find the B field in the solenoid where it is ASSUMED it is uniform. Ampere's law...

No. There is nothing about the equation for the B field of a stack of rings being valid only for a short length. The number of loops is N and can be as large as I want. Moreover, the solenoid does not have to be infinite for the equation to be valid. Of course I recognize the quantity "a"...

The B field at the center of a stack of N circular loops each carrying current I is B = mu0 * N * I / (2a) where a is the radius of the loop, derived using Biot-Savart law. The B field inside a solenoid is B = mu0 * N * I / l where l is the length of the solenoid, derived using Ampere's...