1
vote
0answers
29 views

Velocity in Motional EMF

To calulate motional $\epsilon$, we use the following formula: $\epsilon$ = $-vBL$ To calculate the velocity so the motional $\epsilon$ can be calculated, what is the proper formula from what is ...
0
votes
0answers
42 views

Determining the path of a particle in a velocity selector

I am wondering how you can determine the path of a particle in a velocity selector provided its velocity doesn't equal $ \frac{E}{B} $. I understand that the equation is derived from this force ...
0
votes
0answers
50 views

The electron and classical dynamics

Can I use Newtonian laws of dynamics and kinematics applied to electrons (like $F = ma$ and $s = s_0 + v_0 t + at^2/2$)? If not, why not? I know that everything in principle behaves in a quantum ...
8
votes
3answers
3k views

Can superconducting magnets fly (or repel the earth's core)?

If a superconducting magnet and appropriate power supply had just enough $I\cdot s$ (current $\cdot$ length) so that when it was perpendicular to the earth's magnetic field, the force of the ...