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Author Topic: Two kinds of induction - Henry  (Read 21122 times)

kajunbee

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Re: Two kinds of induction - Henry
« Reply #60 on: August 05, 2020, 12:38:39 AM »
I don’t think the current was zero in two opposing coils. It’s only that the two opposing currents canceled each other, therefore no deflection of galvanometer. The galvanometer has two coils wrapped on same frame. One secondary winding connected to one coil of galvanometer. The other secondary was connected to other coil on galvanometer. Current was still flowing in both secondary’s therefore it should still magnetize a needle. This is the way I’m understanding the setup. My problem is why the interposed zinc plate showed no screening effect.If you continue reading he gives the reason behind some of the discrepancies in previous experiments. The answers are there we just have to look harder.

nix85

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Re: Two kinds of induction - Henry
« Reply #61 on: August 05, 2020, 08:17:17 AM »
"Current was still flowing in both secondary’s therefore it should still magnetize a needle"

no

even if there was full current in both coils (which is your assumption) and these currents only canceled in the galvanometer, still, needle was placed in a way to get magnetized only if two currents did not cancel out.

kajunbee

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Re: Two kinds of induction - Henry
« Reply #62 on: August 05, 2020, 04:18:05 PM »
This is a description of the experiment in Faradays own words. Tell me if you understand it as I do. That there is current induced in secondary’s but they oppose each other in galvanometer.

kajunbee

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Re: Two kinds of induction - Henry
« Reply #63 on: August 05, 2020, 05:33:55 PM »
The magnetizing spiral consist of two wires wrapped around straw. The induced current flows in opposition not only in galvanometer, but also in magnetizing spiral. Therefore current is induced but doesn’t magnetize needle. Only when there is imbalance in current does needle magnetize.

kajunbee

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Re: Two kinds of induction - Henry
« Reply #64 on: August 05, 2020, 06:12:55 PM »
I believe I got that a** backwards. As you say the needle gets magnetized. So it would have to be in opposition in galvanometer, but not in magnetizing spiral. But it’s not clear to me whether the magnetizing spiral is opposing or not. I see no reason to believe that there not in opposition.

nix85

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Re: Two kinds of induction - Henry
« Reply #65 on: August 05, 2020, 11:34:35 PM »
i know the way he describes it is extremely confusing and thus practically worthless, but that is how i got it, that needle gets magnetized only if currents don't cancel out

onepower

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Re: Two kinds of induction - Henry
« Reply #66 on: August 06, 2020, 05:59:19 PM »
There would seem to be many kinds of Induction.

We are generally concerned with Electro-Magnetic induction however this is born from Magnetic field Induction and Electric field Induction which are distinct phenomena in themselves. Wilhelm Weber also discovered the longitudinal force which can induce other objects but he never determined exactly how. There is also self-induction and mutual induction which basically fall under the umbrella of Electromagnetism.

On the far end of the spectrum we also see strange things whereby external field effects have caused/induced the magnetization of metals such as aluminum for a period of hours. In another case a field of force was induced in the region under a high speed moving plastic film coming off a large roll in a manufacturing plant. The invisible field of force supposedly stopped people in there tracks and had the consistency of jello... is this induction?.

I think all relate to Electro-Magnetism however there would seem to be countless possibilities how induced field forces can manifest themselves.

Regards
« Last Edit: August 06, 2020, 10:36:23 PM by onepower »

nix85

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Re: Two kinds of induction - Henry
« Reply #67 on: August 07, 2020, 12:08:52 AM »
In another case a field of force was induced in the region under a high speed moving plastic film coming off a large roll in a manufacturing plant. The invisible field of force supposedly stopped people in there tracks and had the consistency of jello... is this induction?.

only kind of induction i really care about

we hear about these jello like invisible forcefield all over, from us planes exploding into invisible barriers during operation highjump to countless ufo cases, to wiliam hamilton's report on antihill facility, california, no doors but two cylinders in the walls that project such field etc.

nix85

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Re: Two kinds of induction - Henry
« Reply #68 on: August 07, 2020, 06:11:00 PM »
bill hamilton's research on Northrup RCS Facility at Tejon, CA

https://youtu.be/A_74SNIgcfQ?t=1559

kajunbee

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Re: Two kinds of induction - Henry
« Reply #69 on: August 10, 2020, 03:37:54 PM »
https://commons.princeton.edu/josephhenry/galvanometer/

They seem to match his description in his scientific writings. He states that one had 500 turns and the other one was 40 turns.

nix85

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Re: Two kinds of induction - Henry
« Reply #70 on: August 11, 2020, 07:45:55 PM »
in any case needle was meant to get magnetized only if there was difference in current