CN203910127U - Electromagnetic wave demonstration teaching tool - Google Patents
Electromagnetic wave demonstration teaching tool Download PDFInfo
- Publication number
- CN203910127U CN203910127U CN201420341346.3U CN201420341346U CN203910127U CN 203910127 U CN203910127 U CN 203910127U CN 201420341346 U CN201420341346 U CN 201420341346U CN 203910127 U CN203910127 U CN 203910127U
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- electromagnetic wave
- demonstration teaching
- sound source
- coil
- wave demonstration
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Abstract
The utility model discloses an electromagnetic wave demonstration teaching tool. A cylindrical coil, a sound source and a sound box are fixed on the front face of a base; an annular coil is connected with the sound box via an audio line; the cylindrical coil is connected with the sound source via the audio line; the sound box is connected with a power supply; the annular coil is provided with a coil base; and the cylindrical coil is covered with a circular paper tube. According to the electromagnetic wave demonstration teaching tool, the raw material is simple and can be seen every in daily life, the structure is simple, the operation is simple and convenient, "a changing magnetic field produces an electric field and a changing electric field produces a magnetic field" in the Maxwell electromagnetic theory can be vividly and interestingly presented in the demonstration process, the teaching process can trigger interests of students, and the Maxwell electromagnetic theory can be easily mastered.
Description
Technical field
The utility model relates to a kind of teaching aid, particularly a kind of electromagnetic demonstration teaching aid.
Background technology
Physics is one and take natural things, phenomenon, rule as probing into the basic subject of object, experiment is indispensable important step in teaching process, use appropriate experiment teaching aid, can cultivate student's observation ability, operating ability, be conducive to again the raising of the abilities such as their analysis, thinking, more easily to student, provide the chance of probing into innovation.Concerning begining to learn the middle school student of physics, as long as excited the interest of their study, they will put in Physics Learning with the enthusiasm of having one's bosom filled with positively, and it is open, active that Physics Classroom will become, lively atmosphere, and teaching efficiency can double naturally.Because Self-made Realia material therefor is many from student at one's side, a lot of old and useless articles can become the starting material of Self-made Realia, so be easy to the imitated amazing physics phenomena and successfully making presenting in Self-made Realia that facts have proved by student, can naturally cause student's keen interest, excite their psychology of probing into.Once and experiment results to some extent, innovation, advances to some extent to some extent, will make interest more stable, will continue to explore, and continues to climb, thereby likes physics, takes a keen interest in science.In Physics Course standard, point out: advocate the article that use at one's side and carry out Physical Experiment.Use easily available article to carry out inquiry activity and various Physical Experiment at one's side, the distance of the physics that can further and life, allows student profoundly experience the authenticity of science, experiences the relation of science and daily life.
Maxwell's electromagnetic theory has two large bare bones: (1) not only electric charge can produce electric field, and the magnetic field of variation also can produce electric field; (2) not only electric current can produce magnetic field, and the electric field of variation also can produce magnetic field.The foundation of this theory is the essence of being intactly familiar with for the first time electricity and magnetic in human history, and the electromagnet phenomenon of occurring in nature complexity, by the perfect summary of Maxwell, has completed the unification of electricity with magnetic.For middle school student, it is too abstract that this theory seems, how to middle school student, to explain demonstration, always is emphasis and difficult point in teaching.
Summary of the invention
It is a kind of simple in structure that the purpose of this utility model is to provide, and makes material simple and easy, the electromagnetic wave demonstration teaching aid that demonstrative process is interesting.
For achieving the above object, this electromagnetic wave demonstration teaching aid, comprises toroid winding, cylindrical solenoid, audio amplifier, sound source and base, and described cylindrical solenoid, sound source, audio amplifier are fixed on base, described toroid winding is connected with audio amplifier by tone frequency channel wire, and described cylindrical solenoid is connected with sound source by tone frequency channel wire.
Described audio amplifier is connected with power supply.
Described toroid winding is arranged in coil base.
Described sound source is loudspeaker, cassette player or mp3.
Described cylindrical solenoid is covered with round paper tube.
Substantive distinguishing features of the present utility model and progress are:
The application's electromagnetic wave demonstration teaching aid, starting material are simple and easy, it is all the material being seen everywhere in daily life, simple in structure, easy and simple to handle, utilizing voice signal is a kind of characteristic of alternating current, voice signal is input to a coil, at coil, around will generate electromagnetic waves, with another coil, just can receive that the electromagnetic principle of generation demonstrates, in presentation process, image has represented " the magnetic field generation electric field of variation in Maxwell's electromagnetic theory enjoyably, the electric field changing produces magnetic field ", make effective stimulating students ' interests in teaching process, be easy to grasp Maxwell's electromagnetic theory.
Accompanying drawing explanation
Fig. 1 is the plan structure simplified schematic diagram of this electromagnetic wave demonstration teaching aid.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the right view of Fig. 1
Component serial number and title in figure:
Power supply 1, base 2, sound source 3, cylindrical solenoid 4, round paper tube 5, audio amplifier 6, coil base 7, toroid winding 8.
Embodiment
Below in conjunction with accompanying drawing, enforcement structure of the present utility model is described.
Shown in Fig. 1-3, this electromagnetic wave demonstration teaching aid, cylindrical solenoid 4, sound source 3 and audio amplifier 6 are fixed on base 2, described toroid winding 8 is connected with audio amplifier 6 by tone frequency channel wire, described cylindrical solenoid 4 is connected with sound source 3 by tone frequency channel wire, and audio amplifier 6 is connected with power supply 1, and toroid winding 8 is arranged in coil base 7, sound source 3 is loudspeaker, cassette player or mp3, and cylindrical solenoid 4 is covered with round paper tube 5.
The principle of work of this electromagnetic wave demonstration teaching aid is described below in conjunction with accompanying drawing and embodiment.
Embodiment
Open the sound sources 3 such as loudspeaker, cassette player or mp3, play music, voice signal is input to cylindrical solenoid 4 by tone frequency channel wire, and voice signal is a kind of alternating current characteristics, and now cylindrical solenoid 4 around generates electromagnetic waves, and the electric field changing produces magnetic field.Connect the power supply 1 being connected with audio amplifier 6, with toroid winding 8 near or be enclosed within on cylindrical solenoid 4, toroid winding 8 receives the electromagnetic wave that cylindrical solenoid 4 produces, toroid winding 8 is connected with audio amplifier 6 by tone frequency channel wire, convert the electromagnetic wave receiving to voice signal from audio amplifier 6 outputs, the magnetic field changing produces electric field, music that now just can uppick sound source 3 is play on audio amplifier 6.
When toroid winding 8 is during away from cylindrical solenoid 4, audio amplifier 6 voiceless sounds.
Cylindrical solenoid 4 outsides are covered with round paper tube 5, and circular coil encapsulates with shell, and coil is not exposed, and increase the mystique of demonstration, make student produce larger interest and teaching aid are carried out to the understanding of inner structure.
Whole presentation process, has realized coil contactless, but audio amplifier 6 can be play the good result of music, and phenomenon is interesting, effectively excites students ' interest of study, increases the understanding to Maxwell's electromagnetic theory, is easy to the explanation of teacher to this part knowledge.
Claims (5)
1. an electromagnetic wave demonstration teaching aid, it is characterized in that: comprise toroid winding (8), cylindrical solenoid (4), audio amplifier (6), sound source (3) and base (2), described cylindrical solenoid (4), sound source (3), audio amplifier (6) are fixed on base (2), described toroid winding (8) is connected with audio amplifier (6) by tone frequency channel wire, and described cylindrical solenoid (4) is connected with sound source (3) by tone frequency channel wire.
2. electromagnetic wave demonstration teaching aid according to claim 1, is characterized in that: described audio amplifier (6) is connected with power supply (1).
3. electromagnetic wave demonstration teaching aid according to claim 1, is characterized in that: described toroid winding (8) is arranged in coil base (7).
4. electromagnetic wave demonstration teaching aid according to claim 1, is characterized in that: described sound source (3) is loudspeaker, cassette player or mp3.
5. electromagnetic wave demonstration teaching aid according to claim 1, is characterized in that: described cylindrical solenoid (4) is covered with round paper tube (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420341346.3U CN203910127U (en) | 2014-06-25 | 2014-06-25 | Electromagnetic wave demonstration teaching tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420341346.3U CN203910127U (en) | 2014-06-25 | 2014-06-25 | Electromagnetic wave demonstration teaching tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203910127U true CN203910127U (en) | 2014-10-29 |
Family
ID=51784384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420341346.3U Expired - Fee Related CN203910127U (en) | 2014-06-25 | 2014-06-25 | Electromagnetic wave demonstration teaching tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203910127U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064084A (en) * | 2014-06-25 | 2014-09-24 | 南宁市第二中学 | Electromagnetic wave demonstration teaching aid |
| CN105096713A (en) * | 2015-09-07 | 2015-11-25 | 李耀俊 | Magneto-optical communication combined demonstration instrument |
-
2014
- 2014-06-25 CN CN201420341346.3U patent/CN203910127U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064084A (en) * | 2014-06-25 | 2014-09-24 | 南宁市第二中学 | Electromagnetic wave demonstration teaching aid |
| CN105096713A (en) * | 2015-09-07 | 2015-11-25 | 李耀俊 | Magneto-optical communication combined demonstration instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20170625 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |