CN102262833A - Joule law probe instrument - Google Patents
Joule law probe instrument Download PDFInfo
- Publication number
- CN102262833A CN102262833A CN2010101878392A CN201010187839A CN102262833A CN 102262833 A CN102262833 A CN 102262833A CN 2010101878392 A CN2010101878392 A CN 2010101878392A CN 201010187839 A CN201010187839 A CN 201010187839A CN 102262833 A CN102262833 A CN 102262833A
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- China
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- resistance wire
- balloon
- panel
- resistance
- joule law
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- 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.)
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention provides a Joule law probe instrument which comprises a panel, a plurality of terminals, a first resistance wire and a second resistance wire which are electrically connected with the terminals, wherein resistance values of the resistance wires are different. The Joule law probe instrument is characterized in that: a balloon is clamped between the first resistance wire and the panel, and a balloon is clamped between the second resistance wire and the panel. By employing the above structure, combined with an external low voltage power supply, a lead, an ammeter and a voltmeter, the first resistance wire and the second resistance wire are in series or parallel connection in a circuit, thus an experiment can be carried out. The Joule law probe instrument has the advantages that: the resistance wires are energized and emit heat to explode the balloons, heating is fast, a phenomenon is obvious and visibility is large; a resistance wire which emits more heat explodes a balloon first, and an experimental effect is obvious; the resistance wires are cling to the balloons, and heat loss is few, most generated heat is used for heating the balloon, and a phenomenon is stable and reliable.
Description
Technical field
The present invention relates to a kind of teaching aid, it is relevant with which factor and the experiment apparatus how to concern arranged particularly to study the electrical conductor liberated heat.
Background technology
In physics teaching in secondary school, Joule law is one of important law of junior physics.The textbook experiment scheme is to be heating medium with kerosene, and with the change amount of thermometer displays temperature, shortcoming is that kerosene is low to the sensitivity of heat, has heated the long period, and temperature just changes the several years, and the time is long, and phenomenon is not obvious, and cogency is too little.Stirring under inhomogeneous, as to refine oil factors such as quality is unequal, the temperature reading error the is bigger influence, also opposite experimental phenomena may appear.
Summary of the invention
The objective of the invention is: provide a kind of react fast, effect obviously, the Joule law exploring instrument of good reproducibility.
The technical solution adopted in the present invention is: a kind of Joule law exploring instrument, comprise panel, be fixed in several binding posts on the panel, be electrically connected on different first resistance wire and second resistance wires of resistance value on the binding post, it is characterized in that: clamping has balloon between described first resistance wire and the panel, between described second resistance wire and the panel also clamping balloon is arranged.
After adopting said structure, cooperate external low-tension supply, lead, reometer, voltage table, first resistance wire and the second resistance wire serial or parallel connection in circuit, just can have been experimentized.
The invention has the beneficial effects as follows: ignite balloon with the resistance wire heating power, quick heating, phenomenon is obvious, and visibility is big; The many resistance wires of heating are ignited balloon earlier, and experiment effect is obvious; Resistance wire is close on the balloon, and thermal loss is few, and the heat overwhelming majority of generation is used for the balloon heating, and phenomenon is reliable and stable;
Description of drawings
Fig. 1 is a synoptic diagram of the present invention
Among the figure: 1 base plate, 2 panels, 3 first binding posts, 4 first resistance wires, 5 first balloons, 6 second binding posts, 7 second resistance wires, 8 second balloons, 9 the 3rd binding posts.
Embodiment
As shown in Figure 1, be fixed with panel 2 on the base plate 1, be fixed with first binding post 3, second binding post 6, the 3rd binding post 9 that metal material is made on the panel 2; Be electrically connected with between first binding post 3 and second binding post 6 that clamping has first balloon 5 between first resistance wire, 4, the first resistance wires 4 and the panel 2; Be electrically connected with between second binding post 6 and the 3rd binding post 9 that clamping has second balloon 8 between second resistance wire, 7, the second resistance wires 7 and the panel 2;
For making between resistance wire and the panel clamping balloon better, three binding posts all should protrude the panel certain distance, and through actual measurement, this distance is with 3 to 10 centimetres be advisable (differences with the size of balloon).
For strengthening experiment effect, promote interest, first balloon 5 of clamping can have several between first resistance wire 4 and the panel 2, and clamping has second balloon 8 also several can be arranged between second resistance wire 7 and the panel 2.During experiment, always the ballon igniting of certain aspect intact after, the opposing party's balloon just detonates, and can prove absolutely the relation between electric heating what and electric current, voltage.
Claims (3)
1. Joule law exploring instrument, comprise panel, be fixed in several binding posts on the panel, be electrically connected on first resistance wire and second resistance wire on the binding post, described first resistance wire is different with the resistance value of second resistance wire, it is characterized in that: clamping has balloon between described first resistance wire and the panel, between described second resistance wire and the panel also clamping balloon is arranged.
2. as claims 1 described Joule law exploring instrument, it is characterized in that: described binding post protrudes the length of panel greater than 3 centimetres.
3. as claims 2 described Joule law exploring instruments, it is characterized in that: the balloon of clamping has several between described first resistance wire and the panel, and the balloon of clamping also has several between described second resistance wire and the panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101878392A CN102262833A (en) | 2010-05-31 | 2010-05-31 | Joule law probe instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101878392A CN102262833A (en) | 2010-05-31 | 2010-05-31 | Joule law probe instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102262833A true CN102262833A (en) | 2011-11-30 |
Family
ID=45009443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101878392A Pending CN102262833A (en) | 2010-05-31 | 2010-05-31 | Joule law probe instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102262833A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106371154A (en) * | 2016-11-24 | 2017-02-01 | 苏州热工研究院有限公司 | Sonde |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2180306Y (en) * | 1993-10-25 | 1994-10-26 | 赵良知 | Balloon igniter |
| CN2268243Y (en) * | 1995-10-20 | 1997-11-19 | 赵良知 | Controllable balloon firecraker |
-
2010
- 2010-05-31 CN CN2010101878392A patent/CN102262833A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2180306Y (en) * | 1993-10-25 | 1994-10-26 | 赵良知 | Balloon igniter |
| CN2268243Y (en) * | 1995-10-20 | 1997-11-19 | 赵良知 | Controllable balloon firecraker |
Non-Patent Citations (1)
| Title |
|---|
| 朱文军: "焦耳定律实验的比较研究及改进", 《中小学实验与装备》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106371154A (en) * | 2016-11-24 | 2017-02-01 | 苏州热工研究院有限公司 | Sonde |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111130 |