CN204288629U - A kind of self-inductance apparatus for demonstrating - Google Patents
A kind of self-inductance apparatus for demonstrating Download PDFInfo
- Publication number
- CN204288629U CN204288629U CN201420766130.1U CN201420766130U CN204288629U CN 204288629 U CN204288629 U CN 204288629U CN 201420766130 U CN201420766130 U CN 201420766130U CN 204288629 U CN204288629 U CN 204288629U
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- miniature bulb
- self
- multiturn coil
- demonstrating
- utility
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Abstract
The utility model relates to a kind of self-inductance apparatus for demonstrating, comprise multiturn coil, AC power and miniature bulb, described multiturn coil, AC power and miniature bulb are cascaded formation closed circuit, the two ends of described miniature bulb are connected to voltage table, reometer is connected in closed circuit, also be inserted with dielectric rod in described multiturn coil, described dielectric rod is iron staff, copper rod, aluminium bar or perspex bar; Apparatus for demonstrating of the present utility model adopts ac power supply, when inserting different dielectric rods in multiturn coil, and then by observing voltage table, reometer, the miniature bulb in loop, the change of the light and shade change of miniature bulb and voltage, electric current before and after contrast, thus the self inductance vividly, in the ac power supply circuit of displaying place intuitively.
Description
Technical field
The utility model relates to teaching demonstration field, is specially a kind of self-inductance apparatus for demonstrating.
Background technology
When aliving in closed-loop path, the magnetic flux that this electric current produces will by this loop itself, if when the magnetic medium around the shape in the electric current in loop, loop or loop changes, also will be changed by the magnetic flux of himself loop area, thus will induction electromotive force be evoked in himself loop, this magnetic flux due to loop generation itself changes, and in its loop, evoke the phenomenon of induction electromotive force, is called self inductance.Traditional self-inductance apparatus for demonstrating is all connect direct supply in the closed circuit, by magnetic medium around regulating resistance, change size of current or loop shape, change, coordinate miniature bulb to observe the change of electric current in circuit with reometer voltage table, demonstrate self-inductance.But most electricity consumption is alternating current in real life, how in alternating current loop, shows self-inductance, also there is no good apparatus for demonstrating at present.
Summary of the invention
For the problems referred to above, the purpose of this utility model is to provide a kind of apparatus for demonstrating by ac power supply demonstration self inductance.
For solving the problem, the utility model provides a kind of self-inductance apparatus for demonstrating, comprise multiturn coil, AC power and miniature bulb, described multiturn coil, AC power and miniature bulb are cascaded formation closed circuit, the two ends of described miniature bulb are connected to voltage table, be connected to reometer in closed circuit, be also inserted with dielectric rod in described multiturn coil, described dielectric rod is iron staff, copper rod, aluminium bar or perspex bar.
The beneficial effects of the utility model are: apparatus for demonstrating of the present utility model adopts ac power supply, when inserting different dielectric rods in multiturn coil, and then by observing voltage table, reometer, the miniature bulb in loop, the change of the light and shade change of miniature bulb and voltage, electric current before and after contrast, thus the self inductance vividly, in the ac power supply circuit of displaying place intuitively.
Accompanying drawing explanation
Be described in further detail with regard to embodiment of the present utility model below in conjunction with accompanying drawing, wherein:
Fig. 1 is the utility model structural representation.
Embodiment
With reference to a kind of self-inductance apparatus for demonstrating shown in Fig. 1, comprise multiturn coil 1, AC power 2, miniature bulb 3, multiturn coil 1, AC power 2 and miniature bulb 3 are cascaded formation closed circuit, miniature bulb 3 two ends are connected to voltage table 6, be connected to reometer 5 in closed circuit, be also inserted with dielectric rod 4 in multiturn coil 1, the material of dielectric rod 4 is iron staff, copper rod, aluminium bar or perspex bar.
Principle of work of the present utility model is as follows: when demonstration uses, pass into alternating current, because self-inductance can produce inverse electromotive force, the electric current in circuit can be reduced, be equivalent to access a resistance in circuit in coil, and therefore miniature bulb seems slightly dark; When inserting iron staff subsequently, because iron staff is ferromagnetic medium, self-induction electromotive force can be increased, be equivalent to the resistance that in loop, access one is larger, make the minimum of the ER effect in loop, miniature bulb seems to have extinguished, but the reading of voltage table and reometer is non-vanishing, when not inserting iron staff, become very little; And then when inserting the non-ferromagnetic media such as copper rod, aluminium bar, perspex bar successively, self-induction electromotive force change is minimum does not even change, the brightness of miniature bulb does not also change substantially, and the reading of voltage table and reometer is greater than value when inserting iron staff.The explanation different medium quantized by the change of observation electric current, voltage is on the impact of electric current in loop.
From above-described embodiment, this device mainly through show Alternating Current Power Supply time unlike material rod on the impact of electric current in loop, by the mode of bulb " extinguishings ", comparatively novelty show the impact of magnetic medium on self-induction electromotive force.
The above; be only the better embodiment of the utility model; but the utility model protection domain is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.Therefore the utility model protection domain is as the criterion with the protection domain of claims.
Claims (1)
1. a self-inductance apparatus for demonstrating, it is characterized in that: comprise multiturn coil, AC power and miniature bulb, described multiturn coil, AC power and miniature bulb are cascaded formation closed circuit, the two ends of described miniature bulb are connected to voltage table, reometer is connected in closed circuit, also be inserted with dielectric rod in described multiturn coil, described dielectric rod is iron staff, copper rod, aluminium bar or perspex bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420766130.1U CN204288629U (en) | 2014-12-09 | 2014-12-09 | A kind of self-inductance apparatus for demonstrating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420766130.1U CN204288629U (en) | 2014-12-09 | 2014-12-09 | A kind of self-inductance apparatus for demonstrating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204288629U true CN204288629U (en) | 2015-04-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420766130.1U Expired - Fee Related CN204288629U (en) | 2014-12-09 | 2014-12-09 | A kind of self-inductance apparatus for demonstrating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204288629U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107248358A (en) * | 2016-10-16 | 2017-10-13 | 刘绍家 | One kind visualization circuit arrangement |
-
2014
- 2014-12-09 CN CN201420766130.1U patent/CN204288629U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107248358A (en) * | 2016-10-16 | 2017-10-13 | 刘绍家 | One kind visualization circuit arrangement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20151209 |
|
| EXPY | Termination of patent right or utility model |