Who the heck buys this crap? People who line their hats with foil to block out controlling rays get institutionalised. Can we use ownership of healing-magnets energy bracelets etc. as proof of cerebral difficiency and get the sellers locked up and the buyers sterilised?
There’s a stall in the shopping centre here that sells nothing but magnetic braclets and the like (it may do crystals too) :mad: Maybe I’ll set up my own stall selling good-ole Radium pills, give everyone that healthy Monty Burns glow. At least they’ll do something for your money.
I’ve seen ad’s for magnets to put round your car’s fuel pipe to improve milage (I promise I am not making this up). What possible mechanism are they envoking to explain this? Could you sell dashboard “magic fuel” gonks to wave over the petrol flow as you filled up, might be worth a try.
Einstein: There are two infinite things, the Universe, and human stupidity. And I’m not sure about the Universe.
It really depends on what, precisely, the effects of a low frequency EM field are on various tissues. That fact is, we don’t really know, although most reasearch tends to show no link between EM and health problems (and I think that’s probably correct). Your point is taken about the skin surface, however, one can’t ignore the possible effects on deeper tissue, either. No, I don’t think there are any, but we haven’t yet completely ruled it out.
For everyday purposes you are correct. But once you go relativistic (special or general), you’ll find that electric and magnetic fields become inextricably intertwined. Similar to what happens to space and time. So, properly speaking, there are no electric or magnetic fields (except in certain frames of reference), only an electromagnetic field.
I have to admit the comparison to power lines sounds a bit misguided. I mean, they’re power lines for god’s sakes. And this is a blanket atop other blankets. I think electric blankets do have a physical effect on the body though. I don’t recommend using one on a constant basis to try getting to sleep. From now on I’m shutting it off to depend on the residual heat.
For all I know, some company is taking advantage of people frightened about fields, and wiring them up with much smaller spacing. That’s why I said 'it depends on the wiring." If the OP linked to an actual picture of his blanket, I missed it, and apologize for the confusion.
The reasoning goes both ways. It’s Ampere’s law - the field depends on the net current. Saying there’s zero field implies no net current. Saying there’s no net current implies no field.
Well, yes, and for all you know electric blankets may actually work by boiling water and circulating it through steam pipes.
Stop with the hand waving. If you have some actual information, please post it.
And you are still having some kind of problem with “net current”. The field in the situation we’re talking about here does not depend on “net current”. If you have two wires comprising the source path and the return path in an electrical circuit, it’s possible to say that there is no “net current” in them. Is is not possible to say that they have no external magnetic field at any given point in space. Conversely, given a zero measurement of the magnetic field at some point , it is not possible to say that the net current in them is is necessarily zero.
IOW, you’re just waving your hands again. Do it a bit faster, and we can use you as a windmill.
The field in this case most certainly does depend on the current involved, and the geometry. This is exactly why one uses a coaxial geometry if you’re worried about generating a field.
Are you always this rude, or is it only when you’re wrong?
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