CN2624314Y - Demonstrator for magnetic field force between parallel currents - Google Patents
Demonstrator for magnetic field force between parallel currents Download PDFInfo
- Publication number
- CN2624314Y CN2624314Y CN 03231556 CN03231556U CN2624314Y CN 2624314 Y CN2624314 Y CN 2624314Y CN 03231556 CN03231556 CN 03231556 CN 03231556 U CN03231556 U CN 03231556U CN 2624314 Y CN2624314 Y CN 2624314Y
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- China
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- magnetic field
- field force
- framework
- chaff
- cocurrent
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Abstract
The utility model discloses a magnetic field force demonstrator between parallel currents, which comprises a frame, a baseplate, and a wire, and two longitudinal metal foil strips are arranged at the center of the frame. The utility model has the advantages of visual demonstration, high visibility, simple manufacture, low cost, and is an ideal teaching demonstration device.
Description
Technical field
The utility model belongs to a kind of teaching demonstration equipment, magnetic field force demonstrator between specifically a kind of cocurrent.
Background technology
Exist interactional magnetic field force between electric current and the electric current,, will produce the power of attracting each other, pass to rightabout electric current, will produce mutual repulsive force if two parallel straight leads are passed to the electric current of equidirectional.Magnetic field force F between two parallel rectilinear wires is by the strength of current I in two leads
1And I
2, lead length L, two leads between apart from the decision of Several Factors such as r, computing formula is: F=KI
1I
2L/r is because very little (K=2.0 * 10 of scale-up factor K in the formula
-7Newton/ampere
2), so the magnetic field force between cocurrent generally is very little, therefore, the demonstration of the magnetic field force between cocurrent is the difficult point of high school physics lecture experiment always.At present, the demonstration of magnetic field force mostly is teacher's Self-made Realia between electric current, but most Self-made Realia exists two problems: the one, and the experimental provision complex structure, the experiment visibility is low, and experimental phenomena is by moment loading or projection and show indirectly, tests not intuitively, and confidence level is poor; The 2nd, adopt multiturn coil to replace the single straight lead to improve the experiment visibility, test untrue, to the sensation of a kind of fraud of student.
Summary of the invention
The technical problems to be solved in the utility model is at above-mentioned deficiency, develops magnetic field force demonstrator between a kind of cocurrent.
Embodiment of the present utility model is: it comprises framework, base plate, lead, in framework central authorities two chaffs is longitudinally arranged.
The utlity model has demonstrating visual, advantage that visibility is high, and make simply, cost is low modest.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Fig. 3 is the distortion of the chaff under an electric current synoptic diagram in the same way.
Fig. 4 is the distortion of the chaff under inverse current synoptic diagram.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As depicted in figs. 1 and 2, the utility model comprises framework (1), base plate (2), lead (20), in framework (1) central authorities chaff I (14) and chaff II (21) is longitudinally arranged.Chaff I (14) and chaff II (21) are substantially parallel mutually, and the spacing between chaff I (14) and the chaff II (21) is about one centimetre; There is dentation folding crape structure (13) upper end of chaff I (14), and there is dentation folding crape structure (15) lower end; There is dentation folding crape structure (23) upper end of chaff II (21), and there is tooth dress folded tooth shape folding crape structure (19) lower end.
Above-mentioned framework (1) is the door case type framework, is fixed with metal connecting sheet I (11) and last metal connecting sheet II (25) at the upper ledge of framework (1), and metal clip I (12) is housed on last metal edges brace I (11); Metal clip II (24) is housed on last metal connecting sheet II (25).On base plate (2), be fixed with metal connecting sheet I (17) and following metal connecting sheet II (5) down, metal clip I (16) is housed down on the following metal edges brace I (17); Metal clip II (18) is housed down on the following metal edges brace II (5).
The two ends of chaff I (14) are sandwiched in respectively on metal clip I (12) and the following metal clip I (16); The two ends of chaff II (21) are sandwiched in respectively on metal clip II (24) and the following metal clip II (18).
On framework, be furnished with lead (20), cover plate slot (22) is arranged on frame.On base plate, also be furnished with lead.
A handle (9) is arranged on upper ledge.Binding post (10), binding post (26) are arranged below upper ledge, binding post (4), binding post 6 are arranged on base plate (1)), binding post 7 and binding post 8.Base plate (2) also is equipped with pushbutton switch (3).
Above-mentioned chaff I (14) and chaff II (21) can be aluminum foil strips, also can be copper chaffs, and used lead (20) is single copper core rigid line.
When not demonstrating at ordinary times, before and after framework (1), plug cover sheet, with the protection chaff.Cover sheet is inserted in the cover plate slot (22).
Demenstration method: demonstrate when electric current attracts each other in the same way, connect binding post (6) and binding post (8) with a short lead earlier, with two long leads binding post (4) is connected with power supply with binding post (7), press the button switch (3), the moment energising, chaff I (14) and chaff II (21) pass through electric current in the same way, and chaff I (14) and chaff II (21) just draw close mutually, as shown in Figure 4.
When the demonstration inverse current repels mutually, connect binding post (10) and binding post (26) with a short lead earlier, with two long leads binding post (4) is connected with power supply with binding post (8), press the button switch, the moment energising, chaff I (14) and chaff II (21) are by inverse current, and chaff I (14) and chaff II (21) just repel mutually, as shown in Figure 5.
The used power supply of above-mentioned demonstration is a low-voltage high-current power source, and strength of current is more than 10A; Or with the above storage battery of 6V.
Claims (9)
1, magnetic field force demonstrator between a kind of cocurrent, it comprises framework, base plate, lead, it is characterized in that has two chaffs longitudinally in framework central authorities.
2, magnetic field force demonstrator between cocurrent according to claim 1 is characterized in that two strip metal chafves are substantially parallel mutually, and the spacing between the two strip metal chafves is within five centimetres; There is dentation folding crape structure at the two ends of chaff.
3, magnetic field force demonstrator between cocurrent according to claim 1 is characterized in that described framework is the door case type framework, is fixed with metal connecting sheet on two at the upper ledge of framework, on the metal edges brace metal clip is housed on this.
4, magnetic field force demonstrator between cocurrent according to claim 1 is characterized in that being fixed with two following metal connecting sheets on base plate, metal clip down is housed on this time metal edges brace.
5,, it is characterized in that the two ends of chaff are sandwiched in respectively on last metal clip and following metal clip according to magnetic field force demonstrator between claim 1 or 3 or 4 described cocurrents.
6, magnetic field force demonstrator between cocurrent according to claim 1 is characterized in that being evenly equipped with lead on framework and base plate.
7, magnetic field force demonstrator between cocurrent according to claim 1 is characterized in that binding post is all arranged on upper ledge and base plate, at base plate pushbutton switch is installed also.
8, magnetic field force demonstrator between cocurrent according to claim 1 is characterized in that used chaff can be an aluminum foil strip, also can be copper chaff, and used lead is single copper core rigid line.
9, magnetic field force demonstrator between cocurrent according to claim 1 is characterized in that the cover plate slot is arranged on framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03231556 CN2624314Y (en) | 2003-05-22 | 2003-05-22 | Demonstrator for magnetic field force between parallel currents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03231556 CN2624314Y (en) | 2003-05-22 | 2003-05-22 | Demonstrator for magnetic field force between parallel currents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2624314Y true CN2624314Y (en) | 2004-07-07 |
Family
ID=34248224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03231556 Expired - Fee Related CN2624314Y (en) | 2003-05-22 | 2003-05-22 | Demonstrator for magnetic field force between parallel currents |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2624314Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222440A (en) * | 2011-07-07 | 2011-10-19 | 东华理工大学 | Instrument and method for demonstrating interaction of current of conducting wires |
| CN103456214A (en) * | 2013-09-04 | 2013-12-18 | 余姚市科仪光仪有限公司 | Powered-on parallel rectilinear wire interaction demonstrating instrument |
| CN108766155A (en) * | 2018-08-09 | 2018-11-06 | 浙江大学城市学院 | The parallel copper rod stress demonstrating of two energization of one kind and quantitative measurment experiment instrument |
-
2003
- 2003-05-22 CN CN 03231556 patent/CN2624314Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222440A (en) * | 2011-07-07 | 2011-10-19 | 东华理工大学 | Instrument and method for demonstrating interaction of current of conducting wires |
| CN103456214A (en) * | 2013-09-04 | 2013-12-18 | 余姚市科仪光仪有限公司 | Powered-on parallel rectilinear wire interaction demonstrating instrument |
| CN108766155A (en) * | 2018-08-09 | 2018-11-06 | 浙江大学城市学院 | The parallel copper rod stress demonstrating of two energization of one kind and quantitative measurment experiment instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |