- #1
brainyman89
- 97
- 0
let's say we have a square piece of metal and we put this piece in a variable magnetic field, would it get heated? is this the idea of a current?
If we have a rotating metal disk (as the case of a saw for instance), and the we put this rotating disk in a constant uniform magnetic field such that angle between normal vector and B vector is 0 and is not changing since the disk is rotating along the normal axis, would this disk stop rotating? if yes how comes eddy current are induced though we are not changing any of these area, B nor the angle? if no then what is the idea of creating brakes by eddy currents?
if we have a short piece of straight rectilinear wire in motion with velocity V in a uniform constant magnetic field, would we have a potential difference(voltage) on the edges of this wire? if yes how comes we got induced emf without changing any of these area, B nor the angle?
thanks in advance
If we have a rotating metal disk (as the case of a saw for instance), and the we put this rotating disk in a constant uniform magnetic field such that angle between normal vector and B vector is 0 and is not changing since the disk is rotating along the normal axis, would this disk stop rotating? if yes how comes eddy current are induced though we are not changing any of these area, B nor the angle? if no then what is the idea of creating brakes by eddy currents?
if we have a short piece of straight rectilinear wire in motion with velocity V in a uniform constant magnetic field, would we have a potential difference(voltage) on the edges of this wire? if yes how comes we got induced emf without changing any of these area, B nor the angle?
thanks in advance