CN210039323U - Electromagnetic resistance demonstration teaching aid - Google Patents
Electromagnetic resistance demonstration teaching aid Download PDFInfo
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- CN210039323U CN210039323U CN201920130850.1U CN201920130850U CN210039323U CN 210039323 U CN210039323 U CN 210039323U CN 201920130850 U CN201920130850 U CN 201920130850U CN 210039323 U CN210039323 U CN 210039323U
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- teaching aid
- demonstration teaching
- bottom plate
- plate
- cylindrical
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Abstract
The utility model belongs to the physical teaching apparatus field, in particular to electromagnetic resistance demonstrates teaching aid. This demonstration teaching aid mainly includes bottom plate and apron, and inside plank and the aluminum plate and two cylindrical magnet of being covered the parcel by smooth paper placed of bottom plate prop up same height with plank and aluminum plate during the use, then transfer two cylindrical magnet simultaneously and observe gliding speed. The utility model has the advantages that: through this demonstration teaching aid, not only can make the student further master the electromagnetic induction phenomenon, can arouse the very big interest of student moreover. Compared with the original demonstration teaching aid, the demonstration teaching aid has the advantages of openness and high visibility, and can enable students to be clear of experimental phenomena at a glance during demonstration in a classroom.
Description
Technical Field
The utility model belongs to the physical teaching apparatus field, in particular to electromagnetic resistance demonstrates teaching aid.
Background
Lenz's law is an important content in middle school physics teaching, and the existing demonstration device is to make a small ball fall from the top of an aluminum tube, the small ball quickly reaches the lower end of the tube, and make a small ball hidden with neodymium magnet fall from the top of the aluminum tube, but the small ball slowly falls, so as to arouse the interest of students to develop teaching. However, the experiment has the defects that the aluminum pipe is closed, the moving visibility of the small ball in the pipe is poor, and the experiment effect is not obvious and is not intuitive.
Disclosure of Invention
The utility model discloses a remedy prior art not enough, provide an electromagnetic resistance demonstration teaching aid that the phenomenon is obvious, convenient observation.
The utility model discloses a realize through following technical scheme: an electromagnetic resistance demonstration teaching aid mainly comprises a bottom plate, and is characterized in that one end of the bottom plate is hinged with a cover plate, one end of the cover plate, far away from the bottom plate, is provided with a supporting cross rod, the other end of the bottom plate is provided with two cylindrical grooves, and cylindrical magnets are arranged in the grooves; the bottom plate is internally provided with a rectangular groove, a wood plate and an aluminum plate which are the same in shape are arranged in the groove, and the surfaces of the wood plate and the aluminum plate are covered with smooth paper faces with the same friction coefficients.
Furthermore, the cylindrical magnet is a neodymium iron boron strong magnet.
Further, the thickness range of the wood plate and the aluminum plate is 5 mm-8 mm.
Furthermore, the left side and the right side of the upper surfaces of the aluminum plate and the wood plate are provided with baffles.
Furthermore, the bottom of the cylindrical groove is fixed with an iron sheet, and the cylindrical magnet is fixed in the cylindrical groove through magnetic attraction.
The utility model has the advantages that: the utility model discloses simple structure, convenient to use carries easily, through this demonstration teaching aid, can not only make the student further master the electromagnetic induction phenomenon, can arouse the very big interest of student moreover. Compared with the original demonstration teaching aid, the demonstration teaching aid has the advantages of openness and high visibility, and can enable students to be clear of experimental phenomena at a glance during demonstration in a classroom.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1 bottom plate, 2 apron, 3 support horizontal poles, 4 articulated pieces, 5 aluminum plates, 6 plank, 7 cylindrical recess, 8 cylindrical magnet, 9 rectangle recesses.
Detailed Description
The attached drawing is a concrete embodiment of the utility model. The utility model provides an electromagnetic resistance demonstrates teaching aid, mainly includes bottom plate 1, and 1 one end of bottom plate articulates there is apron 2, and apron 2 keeps away from bottom plate one end and is equipped with support horizontal pole 3, and two cylindrical recess 7 have been seted up to 1 other end symmetry of bottom plate, and 7 bottoms of cylindrical recess are fixed with the iron sheet, and cylindrical magnet 8 passes through the magnetic attraction to be fixed in cylindrical recess 7.
The inside rectangle recess 9 that has opened of bottom plate 1, placed the equal same rectangle plank 6 of big or small shape and aluminum plate 5 side by side in the rectangle recess 9, the thickness scope is at 5mm ~8mm, and plank 6 and aluminum plate 5 surface all cover the smooth paper face that coefficient of friction is the same, and plank 6 and aluminum plate 5 seem the same under the cover of paper.
The cylindrical magnet 8 is a neodymium iron boron strong magnet.
Further, in order to prevent the magnet from slipping off, the left side and the right side of the upper surfaces of the aluminum plate 5 and the wood plate 6 are provided with baffles.
When the experiment was gone on, open the apron, plank and aluminum plate all taken out, then the lower extreme supports the one end at the articulated piece of recess principle, the upper end is placed on supporting the horizontal pole, make plank and aluminum plate's gradient keep unanimous strictly, then take out two cylindrical magnet, place on plank and aluminum plate's inclined plane same time same position, loosen the hand and make its gliding, at the in-process that slides down, students can see the speed that two cylindrical magnet gliding and inconsistent, the plank is fast and aluminum plate is slow.
The magnet caused by the reasons can slide up and down along two inclined planes with the same friction coefficient and inclination angles at different speeds, students can actively think, the inclined plane with the slow sliding down is provided to be iron, the magnet is attracted to cause the slow sliding down, but teachers can verify that the inclined plane is not iron to cause great confusion and interest of the students again, teachers solve the doubt and disclose the inclined plane as an aluminum plate, and the cylindrical magnet and the aluminum plate slide relative to each other to generate electromagnetic resistance, so that the magnet is prevented from sliding down, and the concept of the electromagnetic resistance is further provided.
After the demonstration is finished, the parts are classified into the cover plates, so that the parts can be taken away, and the portable multifunctional demonstration instrument is small in size and convenient to carry.
The demonstration teaching aid not only enables students to further master the electromagnetic induction phenomenon, but also can arouse great interest of the students. Compared with the original demonstration teaching aid, the demonstration teaching aid has the advantages of openness and high visibility, and can enable students to be clear of experimental phenomena at a glance during demonstration in a classroom.
Claims (5)
1. An electromagnetic resistance demonstration teaching aid mainly comprises a bottom plate (1), and is characterized in that one end of the bottom plate (1) is hinged with a cover plate (2), one end, far away from the bottom plate, of the cover plate (2) is provided with a supporting cross rod (3), the other end of the bottom plate (1) is provided with two cylindrical grooves (7), and cylindrical magnets (8) are arranged in the cylindrical grooves (7); bottom plate (1) inside is opened there is rectangle recess (9), plank (6) and aluminum plate (5) that the big or small shape is the same are equipped with in rectangle recess (9), plank (6) and aluminum plate (5) surface all cover the smooth paper that coefficient of friction is the same.
2. An electromagnetic resistance demonstration teaching aid according to claim 1, characterized in that the cylindrical magnet (8) is a neodymium iron boron strong magnet.
3. An electromagnetic resistance demonstration teaching aid according to claim 1, characterized in that the thickness of the wood board (6) and the aluminum board (5) ranges from 5mm to 8 mm.
4. An electromagnetic resistance demonstration teaching aid according to claim 1, characterized in that the left and right sides of the upper surface of the aluminum plate (5) and the wood plate (6) are provided with baffles.
5. An electromagnetic resistance demonstration teaching aid according to claim 1, characterized in that an iron sheet is fixed to the bottom of the cylindrical recess (7), and the cylindrical magnet (8) is fixed in the cylindrical recess (7) through magnetic attraction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920130850.1U CN210039323U (en) | 2019-01-25 | 2019-01-25 | Electromagnetic resistance demonstration teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920130850.1U CN210039323U (en) | 2019-01-25 | 2019-01-25 | Electromagnetic resistance demonstration teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210039323U true CN210039323U (en) | 2020-02-07 |
Family
ID=69352737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920130850.1U Expired - Fee Related CN210039323U (en) | 2019-01-25 | 2019-01-25 | Electromagnetic resistance demonstration teaching aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210039323U (en) |
-
2019
- 2019-01-25 CN CN201920130850.1U patent/CN210039323U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200207 Termination date: 20210125 |