CN2403091Y - Electromagnetic resistance demonstrating tube - Google Patents
Electromagnetic resistance demonstrating tube Download PDFInfo
- Publication number
- CN2403091Y CN2403091Y CN 99218420 CN99218420U CN2403091Y CN 2403091 Y CN2403091 Y CN 2403091Y CN 99218420 CN99218420 CN 99218420 CN 99218420 U CN99218420 U CN 99218420U CN 2403091 Y CN2403091 Y CN 2403091Y
- Authority
- CN
- China
- Prior art keywords
- electromagnetic resistance
- pellet
- pipe
- magnet
- bead
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a demonstration teaching appliance used for verifying a Lenz law and displaying electromagnetic resistance in physical teaching, which is composed of a thick wall metal pipe and two pellets of identical sizes and configuration, and a set of observation windows are homogeneously arranged on one side of the thick wall metal pipe, wherein a pellet in which a super magnet is arranged is named as a magnetic pellet and the other pellet in which a magnet is not arranged is named as a nonmagnetic pellet. When the two pellets fall down successively in a metal tube which is vertically arranged, the nonmagnetic pellet can perform the motion of free fall and quickly passes through the metal tube and the magnetic pellet slowly falls down in the metal tube. The utility model has the characteristics of obvious and wonderful effects, richness in interesting and theatricality, simple structure and convenient and reliable use.
Description
The utility model is a kind of instruments used for education that can demonstrate Lenz law and electromagnetic resistance in physics teaching.It freely slowly falls this mode with little club that strong magnet is housed in one and verifies Lenz law and show that electromagnetic resistance is strong in a vertical thick-wall metal pipes.
At present, all adopt traditional dicyclo rotary type Lenz law demonstrator to verify Lenz law.The effect of this instrument is more obvious than it, and interest is stronger, and also has another unique effect---and the demonstration electromagnetic resistance is big.
The purpose of this utility model is to provide a kind of demonstration instrument of new checking Lenz law, its demonstration effect more obviously, richer interest, and it is big to demonstrate electromagnetic resistance.
Below in conjunction with accompanying drawing structure of the present utility model and principle are done a brief introduction.
Fig. 1 is its outside drawing.The utility model is made up of 1 and two bead of heavy wall non-ferromagnetic metal pipe (as aluminum pipe), 2 two major parts.Adorn a strong magnet in the ball in two balls, be called for short the magnetic ball (see figure 2); Dress nonferromagnetic weight is called for short nonmagnetic balls in another ball.The external diameter of two balls be slightly less than aluminum pipe internal diameter, make the ball can free-falling in pipe.When two balls successively (see figure 3) when the upper orifice of vertical placed metal pipe falls, nonmagnetic balls will freely fall very soon, is 0.8 meter as pipe range, then this ball pass through time of pipe will be less than 0.5 second; Magnetic ball then slowly falls in pipe, lasts nearly 3 seconds.Its principle be since strong magnet when falling in metal pipe-wall induction produce annular induced current, as Fig. 4, its magnetic field of inducting hinders magnet and quickens to fall.The effect of nonmagnetic balls is the tester as magnetic ball, contrasts the difference that two balls fall in pipe.
Among Fig. 1, a side of metal tube 1 has one group of evenly distributed window 3, so that observe the whereabouts of ball in pipe.Metal tube 1 can be single, also can be closed by two sections short pipe boxes and form (but being the short tube of two sections fits among Fig. 1), so that carry.Two bead sizes, outward appearance shown in Figure 1 are identical, and weight is close, so that can inspire the student to think deeply the difference of two beads when demonstration.The shell of two beads all uses impact-resistant nonferromugnetic material to make.Why wanting " shock-resistant ", is breakage when preventing that bead lands; Why will adopt nonferromugnetic material, because if adopt ferrimagnet, two beads will attract each other, and the student has just lost the leeway of thinking.
Claims (5)
1, is used to verify Lenz law in a kind of physics teaching and demonstrates the big demonstration of electromagnetic resistance instruments used for education electromagnetic resistance demonstration pipe, it is characterized in that: the heavy wall non-ferromagnetic metal pipe that is had one group of view window by its sidewall and two sizes, outward appearance are identical, and its diameter is slightly less than the bead of metal tube internal diameter and forms.A strong magnet is housed in one of them bead, does not have magnet in another bead.
2. electromagnetic resistance pipe according to claim 1 is characterized in that: a side of non-ferromagnetic metal pipe has one group of evenly distributed view window.
3. electromagnetic resistance pipe according to claim 1 is characterized in that: the aforementioned metal pipe can be whole, also can be formed by two short tube fits.
4. electromagnetic resistance pipe according to claim 1 is characterized in that: size, the outward appearance of two beads are identical, and spherical shell is made with impact-resistant nonferromugnetic material.
5, electromagnetic resistance pipe according to claim 1 is characterized in that: a strong magnet is housed in the magnetic ball of one of two beads, the nonferromagnetic weight is housed in another nonmagnetic balls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99218420 CN2403091Y (en) | 1999-07-26 | 1999-07-26 | Electromagnetic resistance demonstrating tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99218420 CN2403091Y (en) | 1999-07-26 | 1999-07-26 | Electromagnetic resistance demonstrating tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2403091Y true CN2403091Y (en) | 2000-10-25 |
Family
ID=34009621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99218420 Expired - Fee Related CN2403091Y (en) | 1999-07-26 | 1999-07-26 | Electromagnetic resistance demonstrating tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2403091Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103150953A (en) * | 2013-03-20 | 2013-06-12 | 郑扬威 | Lenz's law demonstration device |
| CN105156616A (en) * | 2015-09-16 | 2015-12-16 | 广西大学 | Double-cylindrical-cam retraction-release intermittent feeding device |
| CN107393385A (en) * | 2017-09-05 | 2017-11-24 | 合肥探奥教育科技有限公司 | A kind of vortex demonstration teaching aid for being applied to teaching |
| CN108428397A (en) * | 2018-05-29 | 2018-08-21 | 湖南科技大学 | A kind of number display len's law demonstration instrument |
-
1999
- 1999-07-26 CN CN 99218420 patent/CN2403091Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103150953A (en) * | 2013-03-20 | 2013-06-12 | 郑扬威 | Lenz's law demonstration device |
| CN103150953B (en) * | 2013-03-20 | 2015-08-12 | 郑扬威 | A kind of demonstrator for Lenz law |
| CN105156616A (en) * | 2015-09-16 | 2015-12-16 | 广西大学 | Double-cylindrical-cam retraction-release intermittent feeding device |
| CN107393385A (en) * | 2017-09-05 | 2017-11-24 | 合肥探奥教育科技有限公司 | A kind of vortex demonstration teaching aid for being applied to teaching |
| CN108428397A (en) * | 2018-05-29 | 2018-08-21 | 湖南科技大学 | A kind of number display len's law demonstration instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |