Magnetic Fields

Since the electrons come turn aside to you from the magnetic field, must be avoided to approach to magnets (es. loudspeakers) to a color screen, in how much they would provoke to the magnetization of the mask and therefore the wrong rappresentazione of the colors. Such phenomenon permane also after the removal of the magnet and the correction can be difficult.
The modern televisori and monitor implement a special coil of demagnetization that, to the ignition of the apparatus, produces a short but intense magnetic field with dampened sinusoidale course, to leave from the 50 frequency to Hz of the net electrical worker. This variable field can eliminate one modest residual magnetization. They are available also I affixed smagnetizzatori exteriors to you to use in the case the inner coil he is not effective or it lacks all. As alternative can be used a saldatore by hand that it has an integrated transformer. The manual demagnetization must progressively begin from the center, going away from the screen with movement to spiral, repeating the process until the restoration of the correct colors.
In extreme cases, in particular with magnets to neodymium-iron-boron, the magnetic field can deform the mask mechanically. This damage is irreversible and renders the cathodic tube practically unusable.

In old the black monitor in.bianco and, you deprive of mask, the problem is not placed and can be employs to you for physical demonstrations on the motion of electrons in the magnetic field, remembering but the public not to make it on the house television set!