CN104064084A - Electromagnetic wave demonstration teaching aid - Google Patents
Electromagnetic wave demonstration teaching aid Download PDFInfo
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- CN104064084A CN104064084A CN201410287586.4A CN201410287586A CN104064084A CN 104064084 A CN104064084 A CN 104064084A CN 201410287586 A CN201410287586 A CN 201410287586A CN 104064084 A CN104064084 A CN 104064084A
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- electromagnetic wave
- teaching aid
- demonstration teaching
- wave demonstration
- sound source
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Abstract
The invention discloses an electromagnetic wave demonstration teaching aid. A cylindrical coil, a sound source and a loudspeaker box are fixedly arranged at the front face of a base; an annular coil is connected with the loudspeaker box through an audio line; the cylindrical coil is connected with the sound source through the audio line; the loudspeaker box is connected with a power source; the annular coil is provided with a coil base; and a circular paper cylinder is covered outside the cylindrical coil. The electromagnetic wave demonstration teaching aid is simple in raw materials which can be seen at any place in our daily lives; the electromagnetic wave demonstration teaching aid is simple in structure and convenient and easy to operate; the idea that the changing magnetic fields generate electric fields and the changing electric fields generate magnetic fields in the Maxwell's electromagnetic theory is vividly and interestingly demonstrated, so that the interest of students can be effectively triggered in the teaching process and the students are allowed to grasp the Maxwell's electromagnetic theory easily.
Description
Technical field
The present invention relates to a kind of teaching aid, particularly a kind of electromagnetic demonstration teaching aid.
Background technology
Physics be one taking 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 provide the chance of probing into innovation to student.Concerning begining to learn the middle school student of physics, as long as excited the interest of their study, they will be with the enthusiasm of having one's bosom filled with, and puts in Physics Learning 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 that present in Self-made Realia of facts have proved by student, can naturally cause student's keen interest, excite their psychology of probing into.Once and experiment to some extent results, to some extent innovation, advance to some extent, will make interest more stable, will continue explore, continue to climb, thereby like physics, take 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 at one's side to carry out inquiry activity and various Physical Experiment, 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 explain demonstration to middle school student, always is emphasis and difficult point in teaching.
Summary of the invention
The object of the present invention is to provide one simple in structure, make 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 invention 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, around coil, will generate electromagnetic waves, just can receive that with another coil 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.
Brief description of the drawings
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 invention 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 |
|---|---|---|---|
| CN201410287586.4A CN104064084A (en) | 2014-06-25 | 2014-06-25 | Electromagnetic wave demonstration teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410287586.4A CN104064084A (en) | 2014-06-25 | 2014-06-25 | Electromagnetic wave demonstration teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104064084A true CN104064084A (en) | 2014-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410287586.4A Pending CN104064084A (en) | 2014-06-25 | 2014-06-25 | Electromagnetic wave demonstration teaching aid |
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| CN (1) | CN104064084A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105096713A (en) * | 2015-09-07 | 2015-11-25 | 李耀俊 | Magneto-optical communication combined demonstration instrument |
| RU2644098C2 (en) * | 2016-07-04 | 2018-02-07 | Федеральное государственное казенное военное образовательное учреждение высшего образования "Военно-космическая академия имени А.Ф. Можайского" Министерства обороны Российской Федерации | Installation for solving third maxwell equation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107348A (en) * | 1985-09-30 | 1987-04-08 | 赖晓威 | Audi-frequency earpiece without power and wires |
| CN2069151U (en) * | 1990-05-22 | 1991-01-09 | 赵德才 | Electromagnetic wave transmit-receive demonstrating device for teaching |
| CN101702283A (en) * | 2009-11-24 | 2010-05-05 | 上海市莘格高级中学 | Device for demonstrating electromagnetic coupling transmission experiment |
| CN203910127U (en) * | 2014-06-25 | 2014-10-29 | 南宁市第二中学 | Electromagnetic wave demonstration teaching tool |
-
2014
- 2014-06-25 CN CN201410287586.4A patent/CN104064084A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107348A (en) * | 1985-09-30 | 1987-04-08 | 赖晓威 | Audi-frequency earpiece without power and wires |
| CN2069151U (en) * | 1990-05-22 | 1991-01-09 | 赵德才 | Electromagnetic wave transmit-receive demonstrating device for teaching |
| CN101702283A (en) * | 2009-11-24 | 2010-05-05 | 上海市莘格高级中学 | Device for demonstrating electromagnetic coupling transmission experiment |
| CN203910127U (en) * | 2014-06-25 | 2014-10-29 | 南宁市第二中学 | Electromagnetic wave demonstration teaching tool |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105096713A (en) * | 2015-09-07 | 2015-11-25 | 李耀俊 | Magneto-optical communication combined demonstration instrument |
| RU2644098C2 (en) * | 2016-07-04 | 2018-02-07 | Федеральное государственное казенное военное образовательное учреждение высшего образования "Военно-космическая академия имени А.Ф. Можайского" Министерства обороны Российской Федерации | Installation for solving third maxwell equation |
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Application publication date: 20140924 |