SU1264227A1 - Device for studying magnetism phenomena - Google Patents

Abstract

The invention relates to demonstration devices according to mag1; it allows to demonstrate a change in the direction and magnitude of the magnetic induction vector under the action of a system of permanent magnets and replaceable screens on a ferromagnetic element. In the bottom of the transparent cylindrical body 2 with liquid 1, a vertical axis 6 is fastened. The bearing 7 is mounted on axis 6 and is connected by an elastic connection 8 to a ferromagnetic element 5 having a pointer pointer P. Graduation arrows 9 for an angular scale are located on axis 6 on axis 6 . Between the permanent magnets 4 and the ferromagnetic element 5, a set of interchangeable screens 12 is installed. 2 Il. S.

Description

ts5

O) 4: CE N9

VV

eight

/

Claims (3)

cpuf.i The invention relates to magnetism demonstration devices and can be used, for example, in the educational process. The aim of the invention is to expand the range of tasks by demonstrating the measurement of the direction and magnitude of the magnetic induction vector under the action of a system of permanent magnets and replaceable screens on a ferromagnetic element. Figure 1 schematically shows the device; figure 2 is the same, top view. The device comprises a transparent cylindrical case 2 filled with liquid 1 with a cap 3, a set of permanent magnets 4 and an element 5 made of ferromagnetic material located in the liquid. Through the center of the crane 3 passes vertically located axis 6, fixed at the bottom of the body. A floating bearing 7, connected by means of elastic coupling 8 to a ferromagnetic element 5, and graduation arrows 9 located on the back side, with an angular scale 10, and a ferromagnetic element with a pointer pointer 11 are mounted on the axle. These magnets 4 and ferromagnetic element 5 placed a set of interchangeable screens 12, made of various materials. When a cylindrical corpus 2 is placed in the field of permanent magnets 4, several cases are observed. 1. The cylindrical body is placed in a magnetic field created by a single magnet. In this case, the ferromagnetic element 5 is attracted to the magnet, stretching the elastic connection 8 and turning the floating bearing 7 through this connection. After stopping the ferromagnetic element opposite the magnet, one of the arrows 9 is aligned with the direction in which the ferromagnetic element and the elastic bond is stretched, and the graduation pointer 9 determines the magnitude of the magnetic induction vector using the arrow pointer 11, and its direction using the angular scale 10. 272 2. The cylindrical body is placed on the magnetic field created by two magnets or their system. For this, measurements are successively carried out for each magnet separately, as indicated above. After that, the magnets simultaneously return to their former places and calculate the direction and magnitude of the vector of the total magnetic field. 3. In order to demonstrate the shielding effect of various materials on the magnetic field between the magnet 4 (or a system of magnets) and the ferromagnetic element 5, interchangeable screens 12 are made, made of various materials. According to the measurement results, graphical dependences of the magnitude of the magnetic induction vector on the described factors (location of angular and linear magnets, shielding effects of various materials) are made. The application of the proposed device allows to expand the demonstration possibilities. , a set of permanent magnets and a ferromagnetic element located in a liquid, displaced in Magnets, characterized in that, in order to broaden the demonstration capabilities by measuring the direction and magnitude of the magnetic induction vector, it has a vertically located axis through the center of a krpak and fixed in the bottom of the body a vertical axis mounted on an axis elastic connection with a ferromagnetic element, and graduation arrows located on the lid and fixed on the axis, while Krischka has an angular scale, and the ferromagnetic element has a dial gauge Fir .. FI.2