CN102693664A - Multi-functional electrical experiment instrument - Google Patents
Multi-functional electrical experiment instrument Download PDFInfo
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- CN102693664A CN102693664A CN2011100723577A CN201110072357A CN102693664A CN 102693664 A CN102693664 A CN 102693664A CN 2011100723577 A CN2011100723577 A CN 2011100723577A CN 201110072357 A CN201110072357 A CN 201110072357A CN 102693664 A CN102693664 A CN 102693664A
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Abstract
The invention relates to a multi-functional electrical experiment instrument, comprising two resistance wires with different resistance values. The multi-function electrical experiment instrument is characterized in that: the instrument also includes two clamps clamping matches; the two resistance wires, which are in linear shapes, are fixed on a support respectively by binding posts in a side-by-side suspending mode; the two clamps are respectively used for clamping two matches at the support, so that the two matches' heads provided with chemical substances are respectively pressed on the two resistance wires. According to the invention, beneficial effects are as follows: it takes a little time to carry out the experiment and matches and foams can be lighted in tens of seconds; a small-scale fire disaster can be realized splendidly with controllable security; a resistance ratio between two resistance wires is adjusted and timing for lighting is reliable, so that the success rate of the experiment is high; if the resistance values of the resistance wires and a voltage value of an external power supply are selected appropriately, one resistance wire can light a match continuously and another resistance wire can not light a match; an iron stand is suspended, thereby realizing good visuality; four kinds of experiments including an electrical power experiment, an electrical power rate experiment, a current heat effect experiment and a Joule's law experiment can be completed; and the instrument with simple structure has a remarkable effect and is easy to popularize.
Description
Technical field
The present invention relates to the Experiments of Electricity of a kind of middle school, particularly can do the multi-functional electricity experiment instrument of electric work experiment, electric power experiment, heating effect of current experiment, Joule Law Experiment.
Background technology
The electric work experiment in existing middle school, electric power experiment, heating effect of current experiment, Joule Law Experiment; Mostly adopt resistance wire or fixed value resistance to flask/or beaker in water/or kerosene heating, more relatively water/or the kerosene temperature raise what/or speed experimentize.Shortcoming is that liquid quality is big, and it is slow to heat up; Temperature variation is little, a little less than the cogency; Heat time heating time is long, and thermal loss is many and inhomogeneous, causes the failure of an experiment easily.
Summary of the invention
The objective of the invention is: a kind of multi-functional electricity experiment instrument of doing electric work experiment, electric power experiment, heating effect of current experiment, Joule Law Experiment is provided, accomplishes above-mentioned experiment obvious, reliable for effectly with quick, phenomenon.
The technical scheme that the present invention adopted is: a kind of multi-functional electricity experiment instrument; Comprise two resistance wires that resistance value is different; It is characterized in that: also comprise two clips of clamping match, said two resistance wires are shape linearly all, and said two resistance wires are fixed on the support through binding post respectively side by side vacantly; Said two clips are clamped in two matches on the support respectively, so that the head end that two matches are provided with chemical substance is pressed in respectively on two resistance wires.
Said two resistance wires are near also being placed with foam on the position of match respectively.
Said cradle back is fixed with the sleeve pipe of lower ending opening, and the internal diameter of said sleeve pipe is greater than the external diameter of Metallic rod on the iron stand.
After adopting said structure: with two resistance wire serial or parallel connections, be connected to low-tension supply with external lead, because of the resistance value of two resistance wires is different, what and the speed that produce heat are different; Because of the length of two resistance wires is identical, so the heat radiation speed is consistent; From match lighted and the priority of the foam that ignites different, the size that electric work, electric power, heating effect of current be described respectively with the relation of electric current, voltage, resistance.
The invention has the beneficial effects as follows: experiment is fast, can light match and foam in tens of seconds, and flame obviously and follow dense smog; " miniature fire " is excellent and controlled safely; Adjust the proportionate relationship between the resistance value of two resistance wires, the priority of igniting accurately and reliably, experiment success rate is high; If it is suitable that the magnitude of voltage of the resistance value of resistance wire, external power supply is selected, can accomplish that certain resistance wire can continuously light match, and another root resistance wire can not be lighted match; The iron stand suspension, visibility is good; Can accomplish electric work, electric power, three experiments of heating effect of current (Joule law); Device is simple, effect is remarkable, is easy to promote.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the schematic rear view after the present invention is connected on the iron stand;
Among the figure: 1 support, 2 binding posts, 3 resistance wires, 4 clips, 5 matches, 6 foams, 7 nuts, 8 sleeve pipes, 9 screws, Metallic rod on 10 iron stands.
Embodiment:
As shown in Figure 1, the resistance wire 3 of two linearities is fixed on the support 1 through binding post 2 respectively side by side vacantly, and the length of two resistance wires is identical, but resistance value is different, and promptly the thickness of two resistance wires or resistivity should be inequality.Two clips 4 are clamped in two matches 5 respectively on the support 1, so that the head end that two matches 5 are provided with chemical substance is pressed on respectively on two resistance wires 3.Two resistance wires 3 are near also being placed with foam 6 on the position of match 5 respectively.
For ease of said apparatus being erect demonstration to increase visibility, support 1 back side is fixed with the sleeve pipe 8 of lower ending opening, and the internal diameter of sleeve pipe 8 should be greater than the external diameter of Metallic rod on the iron stand 10, so that support 1 is articulated on the iron stand.
As far as the general physics teacher, usage of the present invention is simple, so this paper omits usage.
Claims (5)
1. multi-functional electricity experiment instrument; Comprise two resistance wires that resistance value is different; It is characterized in that: also comprise two clips of clamping match, said two resistance wires are shape linearly all, and said two resistance wires are fixed on the support through binding post respectively side by side vacantly; Said two clips are clamped in two matches on the support respectively, so that the head end that two matches are provided with chemical substance is pressed in respectively on two resistance wires.
2. multi-functional electricity exploring instrument as claimed in claim 1 is characterized in that: said two resistance wires are near also being placed with foam on the position of match respectively.
3. multi-functional electricity exploring instrument as claimed in claim 2, it is characterized in that: said cradle back is fixed with the sleeve pipe of lower ending opening, and the internal diameter of said sleeve pipe is greater than the external diameter of Metallic rod on the iron stand.
4. multi-functional electricity exploring instrument as claimed in claim 3 is characterized in that: said sleeve pipe upper end closed.
5. multi-functional electricity exploring instrument as claimed in claim 3 is characterized in that: said sleeve pipe open upper end, casing wall are provided with the screw that supplies fastening bolt to stretch into connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100723577A CN102693664A (en) | 2011-03-24 | 2011-03-24 | Multi-functional electrical experiment instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100723577A CN102693664A (en) | 2011-03-24 | 2011-03-24 | Multi-functional electrical experiment instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102693664A true CN102693664A (en) | 2012-09-26 |
Family
ID=46859055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100723577A Pending CN102693664A (en) | 2011-03-24 | 2011-03-24 | Multi-functional electrical experiment instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102693664A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107657878A (en) * | 2017-11-16 | 2018-02-02 | 公安部四川消防研究所 | A kind of electrical fire is multiple and suppresses the demo platform of electric ignition source |
-
2011
- 2011-03-24 CN CN2011100723577A patent/CN102693664A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107657878A (en) * | 2017-11-16 | 2018-02-02 | 公安部四川消防研究所 | A kind of electrical fire is multiple and suppresses the demo platform of electric ignition source |
| CN107657878B (en) * | 2017-11-16 | 2019-06-28 | 公安部四川消防研究所 | A kind of electrical fire is multiple and inhibits the demo platform of electrical ignition source |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120926 |