Time for a review of some basic Physics.
Consider a conductor, whose inductance = L Henries and that conductor being in a changing magnetic field whose rate of change of flux = dφ/dt: induced emf = -L.(dφ/dt). Now consider all the miles and miles of electrical conductors that weave their way in the Earth and on the surface of the Earth plus various chunks and lengths of metal that exist almost everywhere: L will accrue to a very large value. If the reversal of the Earth's magnetic field is rapid enough, dφ/dt becomes a large quantity. Note that although the Earth's magnetic field may be comparatively weak, it is the rate that it changes that is the essentially critical factor. Hence, the induced emf in those conductors could easily become enormous. The consequences will be truly horrific on a total global scale.
Putting metallic items in a cave to protect them from such an event will be a complete waste of time, not that any of us will be around afterwards to argue the point.
I really don't want to think about this
scenario anymore!
Al.
Consider a conductor, whose inductance = L Henries and that conductor being in a changing magnetic field whose rate of change of flux = dφ/dt: induced emf = -L.(dφ/dt). Now consider all the miles and miles of electrical conductors that weave their way in the Earth and on the surface of the Earth plus various chunks and lengths of metal that exist almost everywhere: L will accrue to a very large value. If the reversal of the Earth's magnetic field is rapid enough, dφ/dt becomes a large quantity. Note that although the Earth's magnetic field may be comparatively weak, it is the rate that it changes that is the essentially critical factor. Hence, the induced emf in those conductors could easily become enormous. The consequences will be truly horrific on a total global scale.
Putting metallic items in a cave to protect them from such an event will be a complete waste of time, not that any of us will be around afterwards to argue the point.I really don't want to think about this
scenario anymore! Al.
