CN1790443A - Magnetic field repulsive force and distance relation demonstration instrument and demonstration method - Google Patents
Magnetic field repulsive force and distance relation demonstration instrument and demonstration method Download PDFInfo
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- CN1790443A CN1790443A CN 200510110395 CN200510110395A CN1790443A CN 1790443 A CN1790443 A CN 1790443A CN 200510110395 CN200510110395 CN 200510110395 CN 200510110395 A CN200510110395 A CN 200510110395A CN 1790443 A CN1790443 A CN 1790443A
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Abstract
The invention discloses a demonstrator on the senior physical dynamical elementary, which is characterized by the following: demonstrating the knowledge of gravitation and Coulomb force experiment; testifying the dynamical elementary through mutual action force among magnet poles, wherein the demonstrator of magnet repulsion force and distance relationship is composed of experimental rack, scaleplate, lower magnet pole, needle, upper magnet pole, additional weight and center rod; demonstrating the relationship of dynamics and distance due to regular variation between mutual repulsion force of two magnet poles; displaying the inverse proportion relationship of magnet pole repulsion force and distance.
Description
Technical field
The present invention relates to the teaching demonstration teaching aid that a kind of high school physics is learned, particularly demonstrate a kind of demonstration teaching aid of relevant mechanics principle aspect.
Technical background
In the teaching process of high school physics, particularly in mechanics, electricity teaching, the relevant universal gravitation of mentioning and the knowledge of Coulomb force, the size of all pointing out above-mentioned two kinds of power on the principle all and between two things distance square be inversely proportional to, but when doing confirmatory experiment, because of being subjected to the restriction of condition, general laboratory, middle school all can't provide this confirmatory experiment.Market does not have this type of teaching aid for choosing yet, and influences spreading of knowledge, influences the further raising of quality of instruction yet.
Summary of the invention
At above-mentioned situation, how seeking one has the experiment of this similar rule (being that power and square distance are inversely proportional to) to demonstrate equally, can verify the described principle in the course teaching equally, is purpose of the present invention.Technical scheme of the present invention is to select magnetic material as experiment material, utilizes magnetic pole interphase interaction power to verify mechanics principle.The present invention states measure by following skill to come specific implementation: a kind of magnetic field repulsive force and distance relation demonstration instrument that utilizes the interaction force between the magnetic material, it is characterized in that it is by experiment frame 1, scale 2, lower magnetic pole 3, pointer 4, last magnetic pole 5, counterweight 6 and center-pole 7 are formed, wherein: experiment frame 1, scale 2, pointer 4, counterweight 6 and center-pole 7 are nonmagnetic substance and make, center-pole 7 is fixed on the center on the experiment frame 1, last magnetic pole 5, lower magnetic pole 3 and counterweight 6 all are ring-types, intermediate throughholes, be actively set on the center-pole 7, lower magnetic pole 3 and last magnetic pole 5 are identical in quality, and select for use the magnetic material of tool common flux to make, and magnetic pole forms the mutually exclusive state of the same sex relatively and is installed on the center-pole 7, pointer 4 is fixed on the magnetic pole 5, and the scale mark of sensing scale 2, counterweight 6 is several piece and last magnetic pole 5 a ring-type object identical in quality, and quantity is the 3-8 piece.A kind of method of demonstrating magnetic field repulsive force and distance relation demonstration instrument: it is characterized in that earlier described lower magnetic pole 3 being enclosed within on the experiment frame 1 of center-pole 7 lower ends, to go up magnetic pole 5 again and be enclosed within the centre of center-pole 7, because it is last, two relative down pole polarity are identical, the formation same sex is repelled each other, the effect that utilizes this same sex to repel mutually is suspended in the air magnetic pole 5, utilize the scale value of 4 cuing scales 2 of pointer, be the distance of two pole center positions, above last magnetic pole 5, place three counterweights with last magnetic pole 5 equals in quality then again, the general assembly (TW) that makes suspension is original 4 times, measure the distance of two pole center positions once more, when finding that suspension gravity is original 4 times, centre distance is original 1/2nd between magnetic pole, experimental results show that by this: the size of repulsive force and square result who is inversely proportional to of distance mutually between like pole.Equally, be increased to original 9 times as suspension gravity, then distance is original 1/3rd, and the accuracy of confirmatory experiment is very high once more.
Good effect of the present invention is the demonstration by this demonstrator, simply, the solution of Ming Liaoing square theorem that is inversely proportional to of size distance all and between two articles of the universal gravitation learnt in senior middle school's textbook and Coulomb force, originally be to be difficult to demonstration, more can't do student experimenting.The present invention can more accurately demonstrate out the conclusion that repulsion between two magnetic poles and square distance are inversely proportional to.That moreover this invention is drawn materials easily, made is simple, easy to operate, can promote in vast school.
Description of drawings
Fig. 1: magnetic field repulsive force of the present invention and distance relation demonstration instrument structural representation,
The meaning that each legend mark is expressed as follows respectively among the figure:
1----experiment frame 2----scale 3----lower magnetic pole 4----pointer
The last magnetic pole 6----of 5----counterweight 7----center-pole
Embodiment
Structure below in conjunction with embodiment and Fig. 1 is further described below the present invention:
Present embodiment is in conjunction with classroom instruction, utilize a demonstrator of the present invention of existing material: get the fixedly circular magnet on two useless loudspeakers, insert glass test tube in the interstitial hole, vertically be fixed on the Demonstration table with cementing agent, a graduated scale is fixed on next door vertically bonding, above paste a spear pointer on circular magnet outer peripheral face and point to scale label, the effect that utilizes the magnetic field same sex to repel mutually is suspended in the air top circular magnet, measure the distance of two magnetic blow out centre positions, the top of circular magnet is placed three aluminium blocks with the magnet equal in quality more in the above then, the general assembly (TW) that makes suspension is original 4 times, measure the distance of two magnetic blow out centre positions once more, when finding that suspension gravity is original 4 times, centre distance is original 1/2nd between magnet, experimental results show that by this: the size of repulsive force and square result who is inversely proportional to of distance mutually between same sex magnet.Equally, be increased to original 9 times as suspension gravity, then distance is original 1/3rd, and the accuracy of confirmatory experiment is very high once more.
Claims (3)
1. a magnetic field repulsive force and distance relation demonstration instrument that utilizes the interaction force between the magnetic material, it is characterized in that it is by experiment frame [1], scale [2], lower magnetic pole [3], pointer [4], last magnetic pole [5], counterweight [6] and center-pole [7] are formed, wherein: experiment frame [1], scale [2], pointer [4], counterweight [6] and center-pole [7] are nonmagnetic substance and make, center-pole [7] is fixed on the center on the experiment frame [1], last magnetic pole [5], lower magnetic pole [3] and counterweight [6] all are ring-types, intermediate throughholes, be actively set on the center-pole [7], lower magnetic pole [3] and last magnetic pole [5] are identical in quality, and select for use the magnetic material of tool common flux to make, and magnetic pole forms the mutually exclusive state of the same sex relatively and is installed on the center-pole [7], pointer [4] is fixed on the magnetic pole [5], and the scale mark of sensing scale [2], counterweight [6] is several piece and last magnetic pole [5] ring-type object identical in quality.
2. magnetic field repulsive force according to claim 1 and distance relation demonstration instrument, the quantity that it is characterized in that described counterweight [6] is the 3-8 piece.
3. method of demonstrating described magnetic field repulsive force of claim 1 and distance relation demonstration instrument: it is characterized in that earlier described lower magnetic pole [3] being enclosed within on the experiment frame [1] of center-pole [7] lower end, to go up magnetic pole [5] again and be enclosed within the centre of center-pole [7], because it is last, two relative down pole polarity are identical, the formation same sex is repelled each other, the effect that utilizes this same sex to repel mutually is suspended in the air magnetic pole [5], utilize the scale value of pointer [4] institute cuing scale 2, be the distance of two pole center positions, place three counterweights [6] with last magnetic pole [5] equal in quality then again in the top of last magnetic pole [5], the general assembly (TW) that makes suspension is original 4 times, measure the distance of two pole center positions once more, when finding that suspension gravity is original 4 times, centre distance is original 1/2nd between magnetic pole, experimental results show that by this: the size of mutual repulsive force and square result who is inversely proportional to of distance between like pole, equally, as the gravity that suspends is increased to original 9 times, then distance is original 1/3rd, and the accuracy of confirmatory experiment is very high once more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510110395 CN1790443A (en) | 2005-11-16 | 2005-11-16 | Magnetic field repulsive force and distance relation demonstration instrument and demonstration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510110395 CN1790443A (en) | 2005-11-16 | 2005-11-16 | Magnetic field repulsive force and distance relation demonstration instrument and demonstration method |
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| CN1790443A true CN1790443A (en) | 2006-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510110395 Pending CN1790443A (en) | 2005-11-16 | 2005-11-16 | Magnetic field repulsive force and distance relation demonstration instrument and demonstration method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106023749A (en) * | 2016-07-11 | 2016-10-12 | 齐治平 | Magnetic experiment device |
| CN109935142A (en) * | 2019-04-11 | 2019-06-25 | 王天权 | A kind of apparatus for demonstrating that can demonstrate different types of active force and reaction force |
| CN113030805A (en) * | 2021-03-02 | 2021-06-25 | 陈伟华 | Experiment device and test method based on magnetic asymmetric method |
-
2005
- 2005-11-16 CN CN 200510110395 patent/CN1790443A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106023749A (en) * | 2016-07-11 | 2016-10-12 | 齐治平 | Magnetic experiment device |
| CN109935142A (en) * | 2019-04-11 | 2019-06-25 | 王天权 | A kind of apparatus for demonstrating that can demonstrate different types of active force and reaction force |
| CN113030805A (en) * | 2021-03-02 | 2021-06-25 | 陈伟华 | Experiment device and test method based on magnetic asymmetric method |
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