Lloyd E. Sponenburgh wrote:
Dave__67 fired this volley in
news:73a26711-3806-
:
Hold disk still and spin the magnets around the disk (exact converse
of first case)- no current.
I think you entirely missed the point on that one. The pickup (the
brushes) have to remain fixed relative to the magnets in order to see
the potential in the disk. The potential is only developed under the
magnet.
So, to remain stationary with respect to the magnets, the pickup would
have to rotate with them.
So your case is NOT the "exact converse of the first case", because
you didn't rotate the pickup.
'sides.... you can't have an "exact converse" of a three-variable
arrangement by changing only two variables.
LLoyd
Can you even have the converse of a 3 variable system??
OK, how bout this non-intuition:
The Doppler effect:
You are standing still, an ambulance with sirens blasting approaches, then
recedes. Observe frequency change.
OK, now Ambulance is sitting still with sirens blasting (as they do in
effing Yonkers, NY), and you approach, recede at same speed as the ambulance
previously. Different frequency change!!
goodgawd....
Lots of inneresting counter-intuitive stuff, just can't remember many.
Marketers of course milk the **** out of our now topsy-turvy intuitive-less
world.
Like, Tobaccer companies telling us not to smoke....
WTF??????????????????????????
--
EA