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A Battery In A Magnetic Field

Discussion in 'Electronic Basics' started by phaeton, Apr 8, 2005.

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  1. phaeton

    phaeton Guest

    First off, thanks to all who guided me on the prev. topic of battery
    combinations for odd voltages. Next, i just have a minor question
    probably of little consequence. Might make for a fun discussion,

    I'm about to build the small amplifier and mount it with a cheapo 6"x9"
    4-ohm speaker in a Rubbermaid storage tub. No I'm not expecting
    stellar performance, it's just a "toy" :-D Anyways, while trying to
    determine the best place to mount the battery, i took the cheesy route
    and just stuck it onto the speaker magnet.

    The back of the speaker magnet is not electrically "live" in any way,
    and this is a normal-everday 9V. Though the effects are probably very
    negligible, what sort of influence on the electrochemical reaction
    within the battery would you propose the magnetic field may cause?

    Just curious, not important, and thanks always. :)

  2. Lord Garth

    Lord Garth Guest

    Don't sweat it!
  3. Don Bruder

    Don Bruder Guest

    Nothing of any significance at the level of "zoom" you're talking.
    "Zoomed in" to the point where chemical reactions "become visible", it's
    at least *possible*, even if not particularly *likely*, that the
    magnetic field would tend to cause some sort of "clumping", or perhaps
    "aligning" of the ingredients in the battery due to possible differing
    amounts of susceptibility to magnetic influences, but I wouldn't expect
    to see such a thing (assuming it happens at all) causing any observable
    effect in the overall "batteries make volts" view.
    Interesting question, even though it would seem to me that the answer
    would be of little or no actual importance under real-world conditions.
    Perhaps in a lab environment such as "trying to build molecules an atom
    at a time" such a consideration would be crucial, but for your purposes,
    any effect it has would most likely be so small that it probably can't
    even be detected, let alone measured.
  4. Active8

    Active8 Guest

    "Clumping" could be prevented by periodically rotating the batt, if
    "clumping" existed in appreciable amounts. That *was* a good
    question, though. My mother told me that a magnet would kill a
    battery. Not sure where she got that uninformed bs, but it's
    conceivable that others have heard the same, so it's good to dispel
    such myths.
  5. phaeton

    phaeton Guest

    Lord Garth says:
    Don't sweat what? The battery? The speaker? The asking questions?
    Your accusation that i have been smoking Si? :)

    Don Bruder says:
    Oh I know.... any effect would be completely negligible, particularly
    for this application. The clumping and aligning is what i was
    visualizing, but i'm sure that the electrons would get pulled out of
    this arrangement just the same when I threw the switch and turned the
    circuit on.

    I thought it was an interesting question :)
  6. Lord Garth

    Lord Garth Guest

    Smoking Si--> burning silicon based electronic components but that was
    from another day when (you) we were joking with the OP of that thread. I
    though most would understand the slightly obscure jest. But then I though
    that was directed to Rich as it followed on of his replies.

    To the OP of this thread, "Don't sweat it" means that it is okay to let the
    battery hang from the speaker magnet. I've done that myself and it cause
    no problems.

    It is an interesting question reminescent of the arguments regarding storage
    a car battery on a concrete surface and their apparent rapid discharge
    done so.

    Lighten up!
  7. Don Bruder

    Don Bruder Guest

    Hey, I've heard that's good shit, man! Lemme know if you find enough to
    spare so I can try some! :)
    Yep, that's pretty much what I'd expect, too.
    Indeed. Now one needs to figure out if it's a question that has an
    answer with any meaning! :)
  8. phaeton

    phaeton Guest

    Lord Garth sez:

    Of course! My mention of that above was completely tongue-in-cheek :)
    Sorry if i seemed as if i were miffed about it, as that's not the
    case... I'm typically easy-going and am quick to enjoy
    jokes/puns/humour, etc... (after all, i was talking about eating
    capacitors and soldering antidepressants).. It's cool man.. ;-)
    I've heard this one from a lot of people, but in each case i've asked
    why that would happen. Nobody could explain it, they were just
    repeating what they had heard. Sure enough, at the service station i
    worked at several years ago there was a set of wooden "battery charging
    trays" for keeping the batteries off the concrete shop floor while
    charging or storing. When we had more than 4 batteries the shop
    manager would set the batteries on metal coat hangers, as if the whole
    1/8" of *STEEL* would make all the difference in the world....

    I always thought this was B.S. but I've never had an otherwise healthy
    car battery and properly calibrated concrete surface that i could spare
    for a day or so to try it out. I could be wrong....
  9. Lord Garth

    Lord Garth Guest

    Oh man!!! Its got some epoxy and phenolic mixed in, Wait!!! I have
    a 4" wafer of the pure stuff....monolithic, polished smooth. It'll cost
    you though!!!! 1,0,0 crystal alignment so it snaps straight!!!
  10. Lord Garth

    Lord Garth Guest

    Ha! Hangers huh? Lets send him to electricity 101! Maybe the deal
    with car batteries revolves around the cold soaking effect of sitting
    on a slab. Then again, it could be the acid etching the concrete that
    was the real reason this myth got started.

    I took the battery from my neighbors car and her to a shop so as to test the
    battery and to get a replacement with the exchange. I discovered that her
    old battery had leaked on my carpeting in the hatchback area. The color was
    okay but the plastic fibers had reacted and were clumped as if they were
    I never did figure that out but now I have a liner that things like
    batteries would
    be placed upon.
  11. Don Bruder

    Don Bruder Guest

    Ooooooooooohhhhhh! Uncut! Wow! All I've ever seen was the stuff that was
    already stepped on two or three times before it got to me. Yours has got
    to be some seriously quality stuff, man!

    How much ya want for just a taste?
  12. Rich Grise

    Rich Grise Guest

    Huh? What? I just got here! ;-)
    I was going to say, since the case of the battery is clearly steel, the
    magnetic field doesn't even get through it into the battery's guts anyway.

  13. Lord Garth

    Lord Garth Guest

    It's like the Shroud of Turin, a priceless relic! You can look and drool
    you can' touch.
  14. Lord Garth

    Lord Garth Guest

    Your late man, you gonna have to remember from yesterday! I though
    you were strangely quiet. We're just screwing around.
  15. Don Bruder

    Don Bruder Guest

    Awww, c'mon, man! I'm jonesin' somethin' awful here!
  16. Doug

    Doug Guest

    phaeton wrote:

    My understanding is that the idea goes back to the era when batteries had
    wooden cases. The concrete surface would draw moisture to the batteries.
    Since lead acid batteries are wet inside anyway they must of been lined
    someway. ON the otherhand it most likely has always been BS.
  17. phaeton wrote:

    I lurk quite a bit here, and just had to thank all you guys for a very
    amusing thread. I caught myself chuckling a few times.

    Oh, and by the way, I soldered some paxil and ate some monolithic
    capacitors, and now I'm not feeling so happy..... :S
  18. JazzMan

    JazzMan Guest

    The old batteries were lined with an asphaltic/tar coating.
    The wood still had moisture/electrolyte soaked into it and
    was partially conductive. When set on the ground there was
    enough conductivity to allow the battery to discharge
    over time. With a modern battery that's clean that wouldn't
    be a problem at all, witness the metal racks that batteries
    are commonly stored on at battery stores.

    That's what I remember reading at one time, anyway...

    Please reply to jsavage"at"
    Curse those darned bulk e-mailers!
    "Rats and roaches live by competition under the laws of
    supply and demand. It is the privilege of human beings to
    live under the laws of justice and mercy." - Wendell Berry
  19. Lord Garth

    Lord Garth Guest

  20. Lord Garth

    Lord Garth Guest

    Ha! Wait until nature calls!!!!
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