🚀 go-pugleaf

Mitch posted this humorous bit of fantasy:

"Look,  you know that Faraday proved that if you draw a magnet through
a
copper coil a current will be produced.  What they left out of your
book is
that you CAN glue the magnet to the coil and if both are moved together
in
space (turned for instance) the same current is produced!"

This is of course total nonsense. If there is no change in the magnetic
flux density within the coil, neither voltage nor a resulting current
is produced.  As Faraday put it:

E = - N dB/dt

Where: E is the voltage indiced; N is the number of turns in the coil,
and dB/dt is the time rate of change in the magnetic flux density
passing through the coil. With the magnet glued to the coil (excluding
variations in the permeability of space), no voltage or current is
produced.

Mitch, since this is such very basic material I have to allow that you
may have posted it as a joke to the ever clueless Brian  Stuckless, and
simply overlooked posting the smiley emoticon indicating the nature of
your followup. Other silly and untrue things that you've posted support
this interpretation, such as:

"All electrical energy is produced by magnets."
(Batteries produce electrical energy without the use of magnets.

"Light cannot penetrate a 6 mil piece of black plastic for instance or
a thin piece
of wood, magnets have no problem at all doing so."
(This completely overlooks the fact that magnetic fields and
electromagnetic waves are completely different things. Also,
electromagnetic waves (photons if you prefer) such as x-rays and radio
waves can penetrate objects that are opaque to light in the visible
spectrum).

Post some more funny stuff, it keeps my kids amused!  :-)

Kindest regards,   Harry C