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Lenz's law demonstration experimental device

An experimental device and technology of Lenz's law, applied in the direction of educational appliances, instruments, teaching models, etc., can solve the problems of lack of interest, long distance between coil and galvanometer, long connecting wire, etc., and achieve strong participation of students and effective Visible, easy-to-operate results

Inactive Publication Date: 2019-07-30
HUAIHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This experiment is very good in terms of conception, principle, method and student participation, but there are several deficiencies in the actual operation: 1. In the specific operation, it is necessary to carry sensitive galvanometers, coils and bar magnets, etc. Several instruments, many teachers find it cumbersome and cumbersome, so they seldom or even do not do this demonstration experiment during the teaching process; 2. In order to avoid dragging the connecting wire and galvanometer during operation, the connecting wire is usually long, and the coil and galvanometer The distance is far, and the experimental equipment needs to occupy a wider space; 3. Although the galvanometer can display the induced current in the experiment, it lacks interest. Deflection, the teacher needs to make more explanations during the teaching process, the intuitiveness of the experiment is not high, and the verification effect cannot be achieved

Method used

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  • Lenz's law demonstration experimental device
  • Lenz's law demonstration experimental device
  • Lenz's law demonstration experimental device

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Embodiment Construction

[0017] The invention provides a demonstration experiment device for Lenz's law, which can quickly and intuitively demonstrate the experiment of Lenz's law, so that the experimental results can be quickly obtained.

[0018] The structure diagram of the present invention is as figure 1 As shown, the device is mainly composed of a display board (1), a coil (2), a bar magnet (3), a switch (4), a power supply (5), a base (6) and a circuit board (7). Except that the bar magnet (3) and the power supply (5) can be moved or replaced, other parts are fixedly connected as one. In this embodiment, four 1.5V dry batteries are directly used for power supply.

[0019] The block diagram of the circuit board circuit is as follows: figure 2 As shown, it includes four parts: signal input circuit, negative feedback amplifier circuit, comparison output circuit and drive display circuit.

[0020] The detailed circuit diagram is as image 3 As shown, the signal input circuit is composed of a co...

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Abstract

In order to demonstrate a Lenz's law experiment quickly and visually, the invention provides a Lenz's law demonstration experimental device, and relates to a middle school physics teaching and experimental instrument. The device mainly includes a display panel, a coil, a strip magnet, a power supply, a circuit board and the like. The device is low in cost, convenient to carry and simple in operation, has obvious effects on the demonstration of the Lenz's law, and is beneficial to students' understanding of the law.

Description

technical field [0001] The invention relates to a middle school physics teaching and experiment instrument. Background technique [0002] At the present stage, the Lenz's law demonstration experimental device used in middle school physics teaching usually uses a coil to connect a sensitive galvanometer in series, and inserts a bar magnet into the coil to allow students to observe the deflection direction of the galvanometer pointer. Summarize the relationship between the moving direction of the bar magnet and the deflection direction of the galvanometer pointer, and then draw the experimental conclusion. This experiment is very good in terms of conception, principle, method and student participation, but there are several deficiencies in the actual operation: 1. In the specific operation, it is necessary to carry sensitive galvanometers, coils and bar magnets, etc. Several instruments, many teachers find it cumbersome and cumbersome, so they seldom or even do not do this de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/18
CPCG09B23/181
Inventor 谌雄文谌宝菊周群
Owner HUAIHUA UNIV
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