CN203055279U - Lenz law demonstration instrument - Google Patents
Lenz law demonstration instrument Download PDFInfo
- Publication number
- CN203055279U CN203055279U CN 201320028342 CN201320028342U CN203055279U CN 203055279 U CN203055279 U CN 203055279U CN 201320028342 CN201320028342 CN 201320028342 CN 201320028342 U CN201320028342 U CN 201320028342U CN 203055279 U CN203055279 U CN 203055279U
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- CN
- China
- Prior art keywords
- aluminium circle
- coil
- demonstration instrument
- iron core
- circle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to the teaching aid and especially relates to a Lenz law demonstration instrument. A coil which is connected with a power supply is installed on a power supply pedestal. An iron core is installed on the coil and an aluminum ring is sleeved on the iron core. The structure of the Lenz law demonstration instrument of the utility model is simple. Interaction of a varying magnetic field generated by the an electric coil and the iron core in the coil and the aluminum ring is used to demonstrate the Lenz law and an effect is obvious so that a student can understand the law.
Description
Technical field
The utility model relates to teaching aid, particularly a kind of len's law demonstration instrument.
Background technology
At present, used len's law demonstration instrument typically uses sensitive galvanometer of a coil tandem in the teaching, for when pulling and pushing bar magnet, is unlikely to traction and connects lead and galvanometer, and it is longer to connect lead usually, and coil and galvanometer distance are far away.Increased the shared place of experimental apparatus like this.Though and galvanometer can show induction current in experiment, lacks interest, and the student always has and has no time to attend to observe simultaneously pulling and pushing and galvanometric deflection of magnet.
The utility model content
The purpose of this utility model is to provide a kind of demonstrator of energy ocular demonstration Lenz law.
The purpose of this utility model is achieved through the following channels: a kind of len's law demonstration instrument, and it is at power supply base the coil that connects power supply to be installed, and iron core is installed on the coil, the aluminium snare is on iron core.
As the further optimization of this programme, described aluminium circle is circular.
As the further optimization of this programme, described aluminium circle is circular for the band opening.
As the further optimization of this programme, described aluminium circle is ring-type, and aluminium circle body is provided with some holes.
Further optimization as this programme is separately installed with power switch and operating switch on the described power supply base.
The utility model len's law demonstration instrument is simple in structure, the variation magnetic field and the interaction of aluminium ring that utilize the iron core in hot-wire coil and the coil to produce, and it is obvious to demonstrate the Lenz law effect, is conducive to the student to the understanding of this law.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in further detail:
Fig. 1 is the utility model structural representation;
Fig. 2 is a kind of version of the utility model aluminium circle 4;
Fig. 3 is the another kind of version of the utility model aluminium circle 4;
Among the figure, power supply base 1, coil 2, iron core 3, aluminium circle 4, power switch 5, operating switch 6.
Embodiment
As shown in Figure 1, the utility model len's law demonstration instrument, it is at power supply base 1 coil 2 that connects power supply to be installed, and iron core 3 is installed on the coil 2, aluminium circle 4 is enclosed within on the iron core 3.Described aluminium circle 4 has three kinds of shapes, and a kind of aluminium circle 4 is closed circle ring-type as shown in Figure 1, and second kind of aluminium circle 4 is circular with opening as shown in Figure 2, and the third aluminium circle 4 is that body is provided with the ring-type in some holes as shown in Figure 3.
Operation is separately installed with power switch 5 and operating switch 6 on the power supply base 1 for convenience.
The demonstration principle of the utility model len's law demonstration instrument is: when coil 2 alives, produce alternating magnetic field in iron core 3, the magnetic flux that passes in the closed aluminium circle 4 changes.According to Lenz law, the aluminium circle 4 that is enclosed within the iron core 3 will produce induced current, the current opposite in direction in the direction of induced current and the coil 2.Therefore repel each other with primary winding 2, the electromagnetic force of repelling each other makes jumps on the aluminium circle 4.
1. the demonstration of closed circle ring-type aluminium circle
Open the demonstrator power switch, closed circle ring-type aluminium snare is gone into to press operating switch in the iron core.When operating switch was connected, then the aluminium circle is high takeoff, and kept the operating switch on-state constant, and closed aluminium circle is then kept certain height, and is suspended in iron core central authorities.During the opening operation switch, the aluminium circle falls.
2. body is provided with the demonstration of the ring-type aluminium circle in some holes
The ring-type aluminium snare that body is provided with some holes is gone in the iron core and is pressed operating switch.When operating switch was connected, then the aluminium circle also upwards takeoff, but the height that takeoffs does not have closed aluminium circle height.Keep the operating switch on-state constant, the aluminium circle is also kept certain height, and is suspended in a certain position of iron core central authorities, but does not have the outstanding height of closed aluminium circle.During the opening operation switch, the aluminium circle falls.This is because the induced current that aluminium circle with holes produces does not have closed aluminium circle big, so the height that aluminium circle with holes does not have closed aluminium circle to jump.
3. the demonstration of the circular aluminium circle of band opening
The circular aluminium snare of band opening is gone into to press operating switch in the iron core.When operating switch is connected, aluminium circle transfixion.This is because the aluminium circle does not form the closed-loop path, does not have the electric current of inducting, and is not subjected to the effect of electromagnetic force, so transfixion.
Claims (5)
1. len's law demonstration instrument is characterized in that: it is at power supply base (1) coil (2) that connects power supply to be installed, and iron core (3) is installed on the coil (2), and aluminium circle (4) is enclosed within on the iron core (3).
2. len's law demonstration instrument as claimed in claim 1 is characterized in that: described aluminium circle (4) is the closed circle ring-type.
3. len's law demonstration instrument as claimed in claim 1 is characterized in that: described aluminium circle (4) is circular for the band opening.
4. len's law demonstration instrument as claimed in claim 1 is characterized in that: described aluminium circle (4) is ring-type, and aluminium circle (4) body is provided with some holes.
5. len's law demonstration instrument as claimed in claim 1 is characterized in that: be separately installed with power switch (5) and operating switch (6) on the described power supply base (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320028342 CN203055279U (en) | 2013-01-21 | 2013-01-21 | Lenz law demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320028342 CN203055279U (en) | 2013-01-21 | 2013-01-21 | Lenz law demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203055279U true CN203055279U (en) | 2013-07-10 |
Family
ID=48738209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320028342 Expired - Fee Related CN203055279U (en) | 2013-01-21 | 2013-01-21 | Lenz law demonstration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203055279U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047053A (en) * | 2015-07-01 | 2015-11-11 | 上海市行知实验中学 | Lenz's law demonstration instrument |
| CN110619787A (en) * | 2018-06-18 | 2019-12-27 | 合肥探奥自动化有限公司 | Vortex demonstration device |
-
2013
- 2013-01-21 CN CN 201320028342 patent/CN203055279U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047053A (en) * | 2015-07-01 | 2015-11-11 | 上海市行知实验中学 | Lenz's law demonstration instrument |
| CN105047053B (en) * | 2015-07-01 | 2024-02-23 | 上海市行知实验中学 | Lenz's law demonstrator |
| CN110619787A (en) * | 2018-06-18 | 2019-12-27 | 合肥探奥自动化有限公司 | Vortex demonstration device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20160121 |
|
| EXPY | Termination of patent right or utility model |