Lenz law demonstration device

Abstract

The utility model provides a Lenz's law demonstration device, and relates to the field of exhibition interaction. Comprising at least three slope slideways and a magnetic trolley, the slope slideways have gradients, so that the magnetic trolley slides along each slope slideway, a variable block is arranged on the surface of each slope slideway, and the variable blocks on the slope slideways are made of different materials. The Lenz's law teaching aid is simple in structure, different physical phenomena caused by different materials in the Lenz's law can be visually observed, audiences can experience manually and observe independently, vividness, intuition and interestingness are achieved, and thinking of the audiences is stimulated in an interactive mode.

Description

Technical Field

[0001] The utility model relates to the technical field of exhibition interaction, in particular to a Lenz's law demonstration device. Background Art

[0002] Lenz's law can be used to determine the direction of the electromotive force generated by electromagnetic induction. It was discovered by physicist Heinrich Lenz in 1834. Figure 1 As shown in the figure, the solid lines represent the magnetic flux lines of the magnet, and the dotted lines represent the magnetic flux lines of the induced current. When a moving magnetic field cuts through the magnetic flux lines inside a closed conductor, generating an induced current, the magnetic flux generated by the induced current in the loop always opposes (or hinders) the change in the original magnetic flux. Specifically, the moving magnetic field (magnet) is subjected to an equivalent resistance.

[0003] Lenz's law is the specific embodiment of energy conversion and the law of conservation of energy in the phenomenon of electromagnetic induction, which conforms to the law of conservation of energy. The magnetic field of the induced current obstructs the change in the magnetic flux of the original magnetic field that causes the induced current. Therefore, to maintain the change in the magnetic flux of the original magnetic field, a force must be present. This force overcomes the obstruction of the induced current's magnetic field and performs work, converting other forms of energy into the electrical energy of the induced current. Therefore, the obstruction process in Lenz's law is essentially an energy conversion process. Lenz's law can be simply summarized as follows: the magnetic field of the induced current always obstructs the change in the magnetic flux that causes the induced current. In other words, the effect of the induced current always opposes the cause of the induced current. In summary, it is the law of "increase is equal to decrease, coming is rejected and leaving is retained, and increase is reduced and expansion is expanded."

[0004] Currently, in the popular science education industry, the teaching of Lenz's law in physics generally remains at the level of using books and demonstration experiments, in a rather boring form of preaching, lacking in liveliness, intuitiveness, and interest, as well as interaction. This results in people lacking in thinking when accepting the knowledge of Lenz's law, and having a shallow impression. Utility Model Content

[0005] In order to solve the technical problems existing in the prior art, the embodiment of the present invention provides a device for demonstrating Lenz's law. The technical solution is as follows:

[0006] A Lenz's law demonstration device includes at least three inclined slides and a magnetic trolley. The inclined slides have a slope, so that the magnetic trolley slides along each of the inclined slides. A variable block is provided on the surface of each inclined slide, and the variable blocks on each inclined slide are made of different materials.

[0007] Optionally, the Lenz's law demonstration device further includes a booth, the surface of the booth includes a slope and a plane, the plane is connected to the bottom end of the slope, and the ramp slide is arranged on the surface of the slope.

[0008] Optionally, a planar slide is provided on the plane, and the number of the planar slides is equal to the number of the slope slides. One end of each planar slide is respectively connected to the bottom end of each slope slide, and the other end of each planar slide is provided with a baffle. The baffle is arranged perpendicular to the plane, and all the baffles are located on the same straight line.

[0009] Optionally, the inclined slideways are parallel to each other, and the lengths of the inclined slideways are equal to each other, and an inclined baffle is provided between two adjacent inclined slideways.

[0010] Optionally, the planar slideways are of equal length.

[0011] Optionally, when the number of the ramp slideways is three, the materials of the variable blocks are plastic, aluminum and copper respectively.

[0012] Optionally, the slope of the slope slide is 13°.

[0013] Optionally, the length of the variable block is smaller than the length of the slope slide, the width of the variable block is equal to the width of the slope slide, and the thickness of the variable block is 2 cm.

[0014] Optionally, a magnet is installed on the bottom of the magnetic trolley.

[0015] The beneficial effects of the technical solution provided by the embodiment of the utility model include at least:

[0016] The technical solution of this utility model has a simple and beautiful appearance, easy interactive operation, and a simple structure. It can intuitively observe the different physical phenomena caused by different materials in Lenz's law, allowing the audience to experience it by hand and observe it independently. It is vivid, intuitive and interesting, and stimulates the audience's thinking about physical electromagnetism in an interactive way. This solution uses a slope track and a magnetic cart to experience, feel, interact and learn about Lenz's law. Its method is interesting and exploratory, which can stimulate the audience's interest and enable intuitive experience. It is an effective means of teaching and popularizing science. Through direct hands-on experience of the device, the audience releases the magnetic cart on slopes of different materials and observes the change in the speed of the cart moving downward, thereby understanding the physical principles behind the electromagnetic Lenz's law, feeling the fun and charm brought by basic physics and experiments, triggering thinking and inspiring innovation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is the principle diagram of Lenz's law;

[0019] Figure 2 The present invention provides a schematic structural diagram of a Lenz's law demonstration device.

[0020] Reference numerals:

[0021] 1. Exhibition stand; 21. Plastic variable block; 22. Aluminum variable block; 23. Copper variable block; 3. Inclined slide; 4. Magnetic trolley; 5. Baffle; 6. Inclined baffle. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the usual meanings understood by persons of ordinary skill in the field to which this utility model belongs. The words "first", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0024] It should be noted that the terms "up", "down", "left", "right", "front" and "back" used in the present invention are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0025] like Figure 2 As shown, this embodiment provides a Lenz's law demonstration device; it includes an exhibition stand 1 and a magnetic trolley 4. The surface of the exhibition stand includes a slope and a flat surface, the bottom of the slope connected to the flat surface, and at least three inclined slideways 3 are provided on the surface of the slope. The slope of the inclined slideway 3 is consistent with the slope of the slope, preferably 13°. In this embodiment, there are three inclined slideways 3. Each inclined slideway 3 is provided with a variable block on its surface. The variable blocks on each inclined slideway 3 are made of different materials. The length of the variable block is less than the length of the inclined slideway 3, the width of the variable block is equal to the width of the inclined slideway 3, and the thickness of the variable block is 2 cm. In this embodiment, the surfaces of the three inclined slideways 3 are respectively provided with a Suliang variable block 21, an aluminum variable block 22, and a copper variable block 23.

[0026] A flat slide is provided on the plane of the booth 1. The number of the flat slides is equal to the number of the slope slides 3. Each slope slide 3 corresponds one-to-one to each flat slide. One end of each flat slide is connected to the bottom end of the corresponding slope slide 3. A baffle 5 is provided at the other end of each flat slide. The baffle 5 is arranged perpendicular to the plane. All baffles 5 are located on the same straight line, and the length of each flat slide is the same.

[0027] The inclined slideways 3 are parallel to each other and have the same length, and an inclined baffle 6 is provided between two adjacent inclined slideways 3 .

[0028] A magnet is provided at the bottom of the magnetic trolley 4 to ensure the stability and usability of the trolley body. The magnetic trolley 4 is made to slide along each ramp slide 3, and the difference in sliding speed is observed. The magnetic trolley 4 is released at the top of each of the three ramp slides 3, and the change in the speed of the magnetic trolley 4 moving downward is observed.

[0029] In one embodiment, the length of the slope slide 3 is 1.2 meters, and the length of the variable blocks is 40 centimeters, which can form a current loop to generate sufficient induced current.

[0030] This solution designs a magnetic trolley 4 with a magnet at the bottom, which is placed on the slope slide 3 so that it slides toward the bottom under the action of gravity. By changing the material of the middle section of the ramp slide 3, when the variable blocks on the ramp slide 3 are copper, aluminum, and plastic respectively, the change in the speed of the magnetic cart 4 sliding down the slope can be observed: when the variable block is made of plastic, the magnetic cart 4 will be uniformly accelerated by gravity and slide to the bottom of the ramp slide 3; when the variable block is made of copper, the magnetic cart 4 moves to the top of the copper block. Since the moving magnetic field passes through the closed conductor, an induced current is generated. Due to the effect of Lenz's law, the magnetic field generated by the induced current will hinder the movement of the magnetic cart 4, that is, it is observed that the speed of the magnetic cart 4 will slow down, and after passing the copper block, the magnetic cart 4 will slide normally to the bottom; when the variable block is made of aluminum, the principle is the same as that of the copper block, that is, it is observed that the speed of the magnetic cart 4 on it will slow down, but since the resistance of aluminum is greater than that of copper, the current generated will be smaller, so that the magnetic field of the induced current will have a smaller hindering effect, and the speed of the cart passing through the aluminum block is greater than that of the copper block.

[0031] The working process of this utility model:

[0032] First, pick up the magnetic cart 4 and select a ramp 3. Place the magnetic cart 4 on the starting line at the top of the ramp 3, release the cart, and observe how quickly it slides downward. Then, repeat the same operation on a different ramp 3, observing and comparing the speed changes of the magnetic cart 4 as it slides downward on different ramps 3. This will help you independently understand the principle of the magnetic cart 4's deceleration on the ramp 3 and the relevant electromagnetics.

[0033] This solution has a simple and beautiful appearance, easy interactive operation, and a simple structure. It can intuitively observe the different physical phenomena caused by different materials in Lenz's law, allowing the audience to experience it by hand and observe independently. It is vivid, intuitive, and interesting, and stimulates the audience's thinking about physical electromagnetism in an interactive way. This solution uses a ramp track and a magnetic cart to experience, feel, interact, and learn about Lenz's law. Its method is interesting and exploratory, which can stimulate the audience's interest and provide an intuitive experience. It is an effective means of teaching and popularizing science. Through direct hands-on experience of the device, the audience releases the magnetic cart on slopes of different materials and observes the changes in the speed of the cart moving downward, thereby understanding the physical principles behind the electromagnetic Lenz's law, feeling the fun and charm brought by basic physics and experiments, triggering thinking, and inspiring innovation.

[0034] The following points need to be explained:

[0035] (1) The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention. Other structures may refer to conventional designs.

[0036] (2) For the sake of clarity, the thickness of layers or regions in the drawings used to describe the embodiments of the present invention are exaggerated or reduced, that is, these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or intervening elements may be present.

[0037] (3) In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0038] The above are only specific implementation methods of the present invention, but the protection scope of the present invention is not limited thereto. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A Lenz's law demonstration device, characterized in that: It includes at least three slope slides and a magnetic trolley. The slope slides have a slope so that the magnetic trolley slides along each of the slope slides. A variable block is provided on the surface of each slope slide, and the materials of the variable blocks on each slope slide are different.

2. The Lenz's law demonstration device according to claim 1, characterized in that: The Lenz's law demonstration device also includes a booth, the surface of the booth includes a slope and a plane, the plane is connected to the bottom end of the slope, and the slope slide is arranged on the surface of the slope.

3. The Lenz's law demonstration device according to claim 2, characterized in that: A planar slide is provided on the plane, and the number of the planar slides is equal to the number of the slope slides. One end of each planar slide is respectively connected to the bottom end of each slope slide, and the other end of each planar slide is provided with a baffle. The baffle is arranged perpendicular to the plane, and all the baffles are located on the same straight line.

4. The Lenz's law demonstration device according to claim 1, characterized in that: The slope slideways are parallel to each other, and the lengths of the slope slideways are equal to each other. An inclined baffle is provided between two adjacent slope slideways.

5. The Lenz's law demonstration device according to claim 2, characterized in that: The lengths of the planar slideways are equal.

6. The Lenz's law demonstration device according to claim 1, characterized in that: When the number of the ramp slideways is three, the materials of the variable blocks are plastic, aluminum and copper respectively.

7. The Lenz's law demonstration device according to claim 1, characterized in that: The slope of the slope slide is 13°.

8. The Lenz's law demonstration device according to claim 1, characterized in that: The length of the variable block is smaller than the length of the slope slide, the width of the variable block is equal to the width of the slope slide, and the thickness of the variable block is 2 cm.

9. The Lenz's law demonstration device according to claim 1, characterized in that: A magnet is installed on the bottom of the magnetic trolley.

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