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Visual demonstration instrument for Lenz's law

A technology of Lenz's law and demonstrator, applied in instruments, educational tools, teaching models, etc., can solve problems such as inability to form perceptual knowledge, many knowledge points and many experiments, so as to increase intuition and interest, and improve learning efficiency Effect

Inactive Publication Date: 2016-10-12
刘绍家
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the teaching of "Electromagnetic Induction" in high school physics textbooks. There are many knowledge points and many experiments, especially the Lengz law experiment. It is necessary to explore through four experiments, analyze and summarize, and finally draw a conclusion. Due to the experimental process In the process, the change of the current and the direction of the current is invisible to the students, and they can only listen to the teacher's lectures. They cannot form perceptual knowledge by imagining it. Therefore, it is very difficult for students to master the knowledge and provide a new type of Lenz Law Visual Demonstrator

Method used

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  • Visual demonstration instrument for Lenz's law

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Embodiment 1

[0013] Such as figure 1 As shown, a visual demonstrator of Lenz's law includes a solenoid 1, a coil 2, a visual line 3, a first terminal 4, a controller 5, a second terminal 6, a sensitive ammeter 7, and a bar magnet 8 , the solenoid 1 is surrounded by a coil 2 and a visible line of sight 3, the solenoid 1 is provided with a controller 5, and the solenoid 1 is provided with two first terminals 4, the sensitive The ammeter 7 is provided with two second terminal posts 6, and the two first terminal posts 4 are respectively connected with the two second terminal posts 6 on the sensitive ammeter 7 through the visible line 3, and the bar magnet 8 It can be freely inserted into and pulled out from the solenoid 1 , both ends of the coil 2 are connected to the controller 5 , and the controller 5 is connected to the first terminal on the solenoid 1 .

[0014] Preferably, the visible line 3 includes an electrified wire 31 and a running water lamp 32, the electrified wire 31 is arranged ...

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Abstract

The invention provides a visual demonstration instrument for the Lenz's law, and the instrument comprises a spiral tube, a coil, a visual line, a first binding post, a controller, a second binding post, a sensitive ammeter, and a bar-shaped magnet. The beneficial effects of the invention lie in that a student can directly observe the changes of the size and direction of a current through the visual line when a magnetic pole moves in the spiral tube, so the student can easily understand the experiment phenomenon, can conclude an experiment law and can finally master the Lenz's law; the visual performance and interestingness of an experiment can be improved through employing an LED string to represent the current and the changes of the size and direction of the current; and the learning efficiency of the student can be greatly improved.

Description

【Technical field】 [0001] The invention relates to a teaching aid for demonstrating electromagnetic induction phenomena, in particular to a visual demonstration instrument for Lenz's law. 【Background technique】 [0002] Among high school physics textbooks, the teaching of "Electromagnetic Induction" is both a key point and a difficult point, with more knowledge points and more experiments. Especially for the experiment of Lenz's law, it is necessary to go through four experiments to explore, analyze and summarize, and finally draw a conclusion. During the experiment, the change of the current and the direction of the current cannot be seen or touched by the students. They can only listen to the teacher's lectures, and cannot form a perceptual understanding based on imagination. Therefore, it is very difficult for students to master the knowledge. 【Content of invention】 [0003] The purpose of the present invention is to solve the teaching of "Electromagnetic Induction" in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/18
CPCG09B23/181
Inventor 刘绍家
Owner 刘绍家
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