If you check carefully, Steorn uses two magnets to help make the field
homogeneous.


On Thu, Dec 31, 2009 at 7:56 PM, Harry Veeder <[email protected]> wrote:
>
>
>
>
> ----- Original Message ----
>> From: William Beaty <[email protected]>
>> To: [email protected]
>> Sent: Thu, December 31, 2009 4:36:48 AM
>> Subject: Re: [Vo]:Steorn Replication
>>
>> On Wed, 30 Dec 2009, Craig Haynie wrote:
>>
>> > By moving a magnetic field across a conductor, don't we get induction,
>> > and hence, electricity?
>>
>> Not in a toroid inductor with unsaturated core.  The ring-shape core will 
>> shield
>> the inductor against fields coming from nearby magnets.
>
> For no induction to happen, wouldn't this also require that the magnetic 
> field (of the permanent magnet) be entirely uniform as experienced by the 
> torriod?
>
> Harry
>
>
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