CN210324798U - High school physics lenz law demonstration device - Google Patents
High school physics lenz law demonstration device Download PDFInfo
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- CN210324798U CN210324798U CN201920933012.8U CN201920933012U CN210324798U CN 210324798 U CN210324798 U CN 210324798U CN 201920933012 U CN201920933012 U CN 201920933012U CN 210324798 U CN210324798 U CN 210324798U
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- direction diode
- magnetic field
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- diode
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Abstract
The utility model discloses a high school physics lenz law presentation device, the on-line screen storage device comprises a base, the coil, current amplifier, the base surface left and right sides is provided with two supports, fixed mounting has the slide rail between two supports, the slide rail runs through the coil, coil fixed mounting is on the base, the slide rail left end is provided with the slider, slider left end fixedly connected with bungee, bungee left end and left support fixed connection, slider right side fixedly connected with stay cord, the coil top is provided with current direction diode one and current direction diode two, the coil front side is provided with magnetic field direction diode one and magnetic field direction diode two, current amplifier fixed mounting is in base surface front side, the current amplifier right side is provided with the ampere meter, the ampere meter right side is provided with single-pole double-throw switch. The utility model discloses can audio-visual demonstration result of observing out lenz's law experiment, the student of being more convenient for understands.
Description
Technical Field
The utility model relates to a physics teaching demonstration utensil specifically is a high school physics lenz law presentation device.
Background
In the current teaching, when a teacher explains the Lenz's law principle, students who just come into contact with the knowledge are difficult to understand the abstract concepts, and the teacher is difficult to vividly and vividly explain, which brings certain difficulty to teaching work. Some existing demonstration devices indicate the current direction and the magnetic field direction through light-emitting diodes so as to more vividly demonstrate experiments. However, there are some problems, namely, the amplification factor of the current amplifier is adjusted too much at the beginning of the experiment, which easily causes the current of the light emitting diode to overload and damage; secondly, when the magnet penetrates through the coil, the left hand and the right hand are required to be turned over once, so that the experiment is not coherent, and the observation of the experiment is not facilitated.
Therefore, a demonstration device for the Lenz law of high and medium physics is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high school physics lenz law presentation device for solve the above-mentioned problem of mentioning.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a high-school physics Lenz law demonstration device comprises a base, a coil and a current amplifier, wherein supports are arranged on the left side and the right side of the surface of the base, a sliding rail is fixedly installed between the supports, the sliding rail penetrates through the coil, the coil is fixedly installed on the base, a sliding block is arranged at the left end of the sliding rail, an elastic rope is fixedly connected with the left end of the sliding block, the left end of the elastic rope is fixedly connected with the left support, a pull rope is fixedly connected with the right side of the sliding block, a current direction diode I and a current direction diode II are arranged above the coil, a magnetic field direction diode I and a magnetic field direction diode II are arranged on the front side of the coil, the current amplifier is fixedly installed on the front side of the surface of the base, an ammeter is arranged on; the coil, the current amplifier, the ammeter, the single-pole double-throw switch, the current direction diode I, the current direction diode II, the magnetic field direction diode I and the magnetic field direction diode II are electrically connected.
Preferably, the first current direction diode and the second current direction diode are respectively provided with an arrow-shaped shell at the outer side, the arrow directions of the arrow-shaped shells are opposite, and the first current direction diode and the second current direction diode are connected in parallel.
Preferably, the first magnetic field direction diode and the second magnetic field direction diode are respectively provided with an arrow-shaped shell at the outer side and opposite in arrow direction, and the first magnetic field direction diode and the second magnetic field direction diode are connected in parallel.
Preferably, the middle part of the bracket is provided with a notch corresponding to the slide rail, so that the bar magnet is convenient to mount and use.
Preferably, the number of the elastic ropes is 2, and the elastic ropes are respectively distributed on two sides of the sliding block, so that the sliding block is stressed more stably.
The beneficial effects of the utility model reside in that:
the utility model discloses a through setting up slide rail, slider, stretch cord and stay cord, can place bar magnet on the slider, then stimulate the slider through the stay cord to realize bar magnet and run through the experimental operation of coil, do not need to carry on the operation of falling one's hand again, the ones that more facilitate the experiment go on and more do benefit to the demonstration of observation experiment; by arranging the current amplifier, the current direction diode I, the current direction diode II, the magnetic field direction diode I and the magnetic field direction diode II, the current and the magnetic field change in the induction coil can be observed more clearly in the experimental process through the indication of each arrow; through setting up ampere meter and single-pole double-throw switch, can realize adjusting current amplifier's magnification through the ampere meter, prevent that the magnification from too big to the condition that leads to emitting diode to burn out takes place.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a circuit diagram of the present invention.
In the figure: the device comprises a base 1, a coil 2, a current amplifier 3, a sliding rail 4, a sliding block 5, an elastic rope 6, a pull rope 7, a current amplifier 8, an ammeter 9, a single-pole double-throw switch 10, a current direction diode I11, a current direction diode II 12, a magnetic field direction diode I13 and a magnetic field direction diode II 14.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
In the description of the present invention, it should be understood that the terms "front side", "rear side", "left side", "right side" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-2, a high school physics lenz law presentation device, including base 1, coil 2, current amplifier 8 is the product of cheng doubly brand J15032 model, the base 1 surface left and right sides is provided with support 3 respectively, fixed mounting has slide rail 4 between two supports 3 about, slide rail 4 runs through coil 2, coil 2 fixed mounting is on base 1, slide rail 4 left end is provided with slider 5, 5 left end fixedly connected with stretch cord 6 of slider, the quantity of stretch cord 6 is 2, distribute respectively in the both sides of slider, so that the slider atress is more stable. The left end of the elastic rope 6 is fixedly connected with the left bracket 3, and the right side of the sliding block 5 is fixedly connected with a pull rope 7.
A first current direction diode 11 and a second current direction diode 12 are arranged above the coil 2, arrow-shaped shells are arranged on the outer sides of the first current direction diode 11 and the second current direction diode 12, the directions of the arrow-shaped shells are opposite, the first current direction diode 11 and the second current direction diode 12 are connected in parallel, a first magnetic field direction diode 13 and a second magnetic field direction diode 14 are arranged on the front side of the coil 2, arrow-shaped shells are arranged on the outer sides of the first magnetic field direction diode 13 and the second magnetic field direction diode 14, the directions of the arrows of the arrow-shaped shells are opposite, and the first magnetic field direction diode 13 and the second magnetic field direction diode 14 are connected in parallel.
The current amplifier 8 is fixedly arranged on the front side of the surface of the base 1, an ammeter 9 is arranged on the right side of the current amplifier 8, the ammeter 9 is a 44C2 model produced by a Changcheng electric meter in Leqing city, the indication range is-30 mA, and a single-pole double-throw switch 10 is arranged on the right side of the ammeter 9; the coil 2, the current amplifier 8, the ammeter 9, the single-pole double-throw switch 10, the current direction diode I11, the current direction diode II 12, the magnetic field direction diode I13 and the magnetic field direction diode II 14 are electrically connected.
The utility model discloses a theory of operation: when using the utility model discloses the time, at first in the circuit at single-pole double-throw switch 10 closure to ampere meter 9 place, then put into slider 5 with bar magnet on, pull stay cord 7 with the hand and make bar magnet pass through coil 2, the induced current that produces in coil 2 at this moment can show in ampere meter 9 after current amplifier 8 enlargies, then adjust current amplifier 8's adjust knob, the electric current that makes to show in ampere meter 9 accords with the luminous required current value of current direction diode 11, current direction diode two 12, magnetic field direction diode 13 and magnetic field direction diode two 14. Then the single-pole double-throw switch 10 is closed to the other end, at the moment, the diode circuit forms a path, when the pull rope 7 is pulled, the bar-shaped magnet passes through the coil, the induced current generated at the moment is amplified by the circuit amplifier 8 and then passes through a parallel circuit formed by the current direction diode I11 and the current direction diode II 12 and a parallel circuit formed by the magnetic field direction diode I13 and the magnetic field direction diode II 14, and as the light-emitting diode has unidirectionality, the current direction diode I11 and the magnetic field direction diode II 14 emit light at the moment, so that the current direction and the magnetic field direction at the moment can be seen; when the current direction is changed, the circuit direction diode 12 and the magnetic field direction diode 13 emit light, and the changed current direction and magnetic field direction can be seen.
On bar magnet put into slider 5, pulling stay cord 7 can make slider 5 slide along slide rail 4 to drive bar magnet and remove along slide rail 4, after passing coil 2, can slowly relax the hand, at this moment, slider 5 can remove to the original position along slide rail 4 under the effect of stretch cord 6, thereby passes through coil 2 once more, with the demonstration of carrying out the experiment in succession.
Further, the above-mentioned fixed connection and fixed mounting are to be understood in a broad sense unless otherwise specifically stated or limited, and may be, for example, welding, gluing, or integrally formed, as is conventional in the art.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (5)
1. The utility model provides a high school physics lenz's law presentation device, includes base (1), coil (2), current amplifier (8), its characterized in that: the magnetic field direction detector is characterized in that supports (3) are arranged on the left side and the right side of the surface of the base (1), a sliding rail (4) is fixedly installed between the supports (3), the sliding rail (4) penetrates through the coil (2), the coil (2) is fixedly installed on the base (1), a sliding block (5) is arranged at the left end of the sliding rail (4), an elastic rope (6) is fixedly connected to the left end of the sliding block (5), the left end of the elastic rope (6) is fixedly connected with the left support (3), a pulling rope (7) is fixedly connected to the right side of the sliding block (5), a current direction diode I (11) and a current direction diode II (12) are arranged above the coil (2), a magnetic field direction diode I (13) and a magnetic field direction diode II (14) are arranged on the front side of the surface of the base (1), a current amplifier (8) is fixedly installed on the front side of the surface of, a single-pole double-throw switch (10) is arranged on the right side of the ammeter (9); the coil (2), the current amplifier (8), the ammeter (9), the single-pole double-throw switch (10), the current direction diode I (11), the current direction diode II (12), the magnetic field direction diode I (13) and the magnetic field direction diode II (14) are electrically connected.
2. The high and medium physical lenz's law demonstration device according to claim 1, wherein: current direction diode one (11) with the arrow direction that current direction diode two (12) outside all was provided with arrow shape shell and arrow shape shell is opposite, current direction diode one (11) with current direction diode two (12) parallel connection.
3. The high and medium physical lenz's law demonstration device according to claim 1, wherein: magnetic field direction diode one (13) with the arrow direction that magnetic field direction diode two (14) outside all was provided with arrow shape shell and arrow shape shell is opposite, magnetic field direction diode one (13) with magnetic field direction diode two (14) parallel connection.
4. The high and medium physical lenz's law demonstration device according to claim 1, wherein: the middle part of the bracket (3) is provided with a gap corresponding to the sliding rail (4).
5. The high and medium physical lenz's law demonstration device according to claim 1, wherein: the number of the elastic ropes (6) is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920933012.8U CN210324798U (en) | 2019-06-20 | 2019-06-20 | High school physics lenz law demonstration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920933012.8U CN210324798U (en) | 2019-06-20 | 2019-06-20 | High school physics lenz law demonstration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210324798U true CN210324798U (en) | 2020-04-14 |
Family
ID=70145529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920933012.8U Expired - Fee Related CN210324798U (en) | 2019-06-20 | 2019-06-20 | High school physics lenz law demonstration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210324798U (en) |
-
2019
- 2019-06-20 CN CN201920933012.8U patent/CN210324798U/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 |
Granted publication date: 20200414 Termination date: 20210620 |
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| CF01 | Termination of patent right due to non-payment of annual fee |