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J. Perelman
"Entertaining physics". Book 2.
Chapter 8. The magnetism. Electricity


When reading the previous passage, the question naturally arises: is it possible to defend against the action of magnetic forces, to hide from them for some impenetrable obstacle for them?

It is quite possible, and a fantastic invention Martians could be neutralized in advance if appropriate steps were taken.

Oddly enough, a substance impervious to magnetic forces, is the same iron that is easily magnetized! Inside the iron ring of the compass needle is not deflected by a magnet placed outside the ring.

Metal case can be protected from the action of magnetic forces steel mechanism for pocket watches. If you put a gold watch on the poles of a powerful horseshoe magnet, all steel parts of the mechanism, especially thin hair spring with equalizer*, aminities would watch would no longer walk properly. Removing the magnet, you will not return the watch to a former condition, the steel parts of the mechanism will remain magnetized, and watches will be the most radical repair, replacement of many parts of the new mechanism. Therefore, with a gold watch should not do such experience, he will cost too expensive.

That protects the steel clock mechanism from the magnetization?

On the contrary, with a clock mechanism which is tightly closed iron or steel caps, you can easily make this experience a magnetic force through the iron and steel do not penetrate. Bring such a watch windings strongest Dynamo, loyalty course will not suffer in the slightest degree. For electrical engineers such cheap iron watches are ideal, while gold or silver soon become unfit for use from the magnets.

* If only this thread is not made from a special alloy of Invar - metal, not able to be magnetized, although its composition and consisting of iron and Nickel.

Entertaining physics J. Perelman


System Orphus


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