Nikola Tesla's EGG of Columbus from the 1893 Chicago world's fair
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All Comments (14)
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@r66dTesla Does this also work with an egg shaped metal tea ball on an induction cooker hotplate?
(Well, induction hotplates deserve to be banned for causing cancer, but in physics lessons they are ok.)
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@MrNobody808 If it was molten metal would it create a magnetic field?
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if it was molten metal would it create a magnetic field? just like the earth? that is very interesting to me.
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if it was molten metal would it create a magnetic field? just like the earth?
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Where do I get one of those eggs from ?... :(
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how?
wtficantgetausername 11 months ago
@wtficantgetausername
The egg is made of brass and it spins on its major axis, standing on end due to gyroscopic action driven by a magnetic field created by a toroidal iron core stator on which four coils are wound. The device is powered by a two-phase alternating current source (variable speed alternator) to create the rotating magnetic field .
It is used to demonstrate and explain the principles of the rotating magnetic field model and the induction motor.
Dr. Greene
r66dTesla 11 months ago
@r66dTesla thanks!! will it reach a certain speed and stay there? or can it go on til the current goes up?
wtficantgetausername 11 months ago
@wtficantgetausername
The egg will continue to spin as long as current is applied
to the rotating magnetic field, once this current is stopped the magnetic filed is no longer a factor in spinning the egg and it will "run down" like a child's toy spinning top ,although is does reach speeds of approximately 4,000 RPMs and does hit a resonant frequency as you can hear ,so it would take some time,Thank you for watching and for you questions.
Dr. Greene
r66dTesla 11 months ago