how wrist watches are protected from magnetic fields?
They are made of non-magnetic materials. Copper and thin are not magnetic. Together, they make brass, and brass is not magnetic. They could be even made of plastic!
I think you are asking about electronic watch ,not mechanical. I do like to know the answer.
No watch can resist a strong magnetic field. The metals used in watch construction are chosen for their ability to not become magnetized after exposure to a magnetic field so the effect of magnetism is only during exposure and does not remain after wards. Even though these watches are described as anti magnetic this is only as far as low fields are concerned, it is still advisable to keep well clear of the high level fields that occur in industry and with some medical equipment.
