CN203351096U

CN203351096U - Lenz's law demonstrating instrument

Info

Publication number: CN203351096U
Application number: CN 201320194277
Authority: CN
Inventors: 姜洪喜; 任敦亮; 李海宝
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-04-17
Filing date: 2013-04-17
Publication date: 2013-12-18
Anticipated expiration: 2023-04-17

Abstract

A Lenz's law demonstrating instrument comprises a high-mass iron bracket bench (1), a metallic cup (2), six turns of enclosed coils (3) wired outside a fine synthetic glass pipe and provided with highly bright light emitting diodes, a transparent fine synthetic glass pipe (4) having an interlayer and filled with copper sulphate conductive liquid, a suspension support (5), a spring weigher (6), an aluminum block (7) and a strong magnet (8). The Lenz's law demonstrating instrument is characterized in that the high-mass iron bracket bench (1) is placed on a desktop, the upper end of the spring weigher (6) is hung on the support of the high-mass iron bracket bench (1), the lower end of the spring weigher (6) is hooked on the suspension support (5), the metallic cup (2) aligns with the lower end of the transparent fine synthetic glass pipe (4) having the interlayer and filled with copper sulphate conductive liquid. For demonstration, the aluminum block (7) and the strong magnet (8) are placed in order to start the demonstration.

Description

Len's law demonstration instrument

Technical field

The utility model relates to a kind of len's law demonstration instrument, particularly relates to a kind of use with transparent organic glass tubule, the spring balance of interlayer, in-built copper sulphate conduction liquid and demonstrates Lenz law with the coil of light emitting diode.

Background technology

Traditional demonstration adopts an elongated aluminum pipe, a cylindrical little aluminium block and a same size strong magnet.Vertically hold aluminum pipe during demonstration, successively put into aluminium block and strong magnet.Aluminium block is in the Guan Zhongzuo movement of falling object, and fall time is short; When strong magnet falls in pipe, because relative motion causes magnetic flux change in aluminum pipe.According to Lenz law: the magnetic field that the vortex current produced in aluminum pipe excites will hinder relative its motion of strong magnet, therefore the strong magnet fall time is longer.Verified that Lenz law has the characteristic that hinders relative motion.Shortcoming: demo content is single, has only demonstrated the motion-impeding characteristic of Lenz law; Cannot see thing piece dropping process in pipe, experimental phenomena is not directly perceived, can only land the sound according to the thing piece and judge fall time length, judges whether aluminum pipe has hindered the strong magnet relative motion; Aluminium block falls very fast, and while falling on lectern, easy bullet is fallen ground; Be unfavorable for demonstrating in large lectures, rear row student is difficult for observing experimental phenomena (listen to a thing piece land the sound); Aluminum pipe and common iron pipe profile, color similarity, easily make the student produce query.

Summary of the invention

For the method that overcomes existing demonstration Lenz law is directly perceived, the observation experiment phenomenon is inconvenient and be unsuitable for the deficiency that large lectures are imparted knowledge to students, the utility model provides a kind of len's law demonstration instrument, and this demonstrator is simple to operate, process is directly perceived, phenomenon is obvious, be suitable for the large lectures teaching.

The utility model adopted technical scheme of dealing with problems is: a kind of len's law demonstration instrument, by large quality iron stand (1), metal cup (2), 6 circles are wrapped in interlayer with the closing coil (3) of high-brightness light emitting diode, the transparent organic glass tubule (4) of in-built copper sulphate conduction liquid, suspension holdfast (5), spring balance (6), aluminium block (7), strong magnet (8) combines, it is characterized in that: large quality iron stand (1) is placed on lectern, spring balance (6) upper end is hung on the support of large quality iron stand (1), lower end is hooked on suspension holdfast (5), metal cup (2) is aimed at interlayer, place the thin glass pipe of transparent organic glass of in-built copper sulphate conduction liquid (4) lower end.

The beneficial effects of the utility model are: demo content has enriched, and can demonstrate the motion-impeding characteristic of Lenz law; But the essence of ocular demonstration Lenz law is electron energy in electromagnetics; Can measure electromagnetic damping power; Electric signal is changed into to light signal, can directly show faradic direction; Adopt transparent material, position, thing piece whereabouts, speed, time are very clear; Organic glass tubule color and luster becomes clear (light blue), more easily attracts, stimulating students ' interests, also mislead students not; Metallic cylinder is as receiver, can prevent that thing piece bullet from falling ground; When the thing piece falls into, sound is larger, is conducive to demonstrate in large lectures; Utilize high brightness LED from top to bottom luminous order produce eye-catching sense of movement, indicate strong magnet any time position, intuitively illustrate that again conversion has occurred energy during the course---strong magnet at the uniform velocity falls, and mechanical energy is transformed into electric energy.

The accompanying drawing explanation

Fig. 1 is the len's law demonstration instrument schematic diagram.In figure: 1-large quality iron stand, 2-metal cup, 3-with the closing coil of high-brightness light emitting diode, 4-with the transparent organic glass tubule of interlayer, in-built copper sulphate conduction liquid, 5-suspension holdfast, 6-spring balance, 7-aluminium block, 8-strong magnet.

Embodiment

Large quality iron stand 1 is placed on lectern, spring balance 6 upper ends are hung on the support of large quality iron stand 1, and lower end is hooked on suspension holdfast 5, and metal cup 2 is aimed at the thin glass pipe of transparent organic glass 4 lower ends of interlayer, in-built copper sulphate conduction liquid and placed, after device is stable, start demonstration.First put into aluminium block 7, falling speed is fast, and the time is short.When aluminium block falls in pipe, high-brightness light emitting diode is not luminous; Spring balance 6 pointers are motionless.Put into strong magnet 8, falling speed is considerably slower than aluminium block 7, is close at the uniform velocity; Spring balance 6 registrations become large, more obvious for making phenomenon, and the polylith strong magnet is stacked to release; When strong magnet 8 passes with the high-brightness light emitting diode closing coil from top to bottom, highlighted diode is luminous successively.Indicating strong magnet any time position, intuitively illustrate that again conversion has occurred energy during the course---strong magnet at the uniform velocity falls, and mechanical energy is transformed into electric energy.

Claims

1. a len's law demonstration instrument, by large quality iron stand (1), metal cup (2), 6 circles are wrapped in interlayer with the closing coil (3) of high-brightness light emitting diode, the transparent organic glass tubule (4) of in-built copper sulphate conduction liquid, suspension holdfast (5), spring balance (6), aluminium block (7), strong magnet (8) combines, it is characterized in that: large quality iron stand (1) is placed on lectern, spring balance (6) upper end is hung on the support of large quality iron stand (1), lower end is hooked on suspension holdfast (5), metal cup (2) is aimed at interlayer, place the thin glass pipe of transparent organic glass of in-built copper sulphate conduction liquid (4) lower end.