CN203013077U - Electrical work research instrument - Google Patents
Electrical work research instrument Download PDFInfo
- Publication number
- CN203013077U CN203013077U CN 201220630536 CN201220630536U CN203013077U CN 203013077 U CN203013077 U CN 203013077U CN 201220630536 CN201220630536 CN 201220630536 CN 201220630536 U CN201220630536 U CN 201220630536U CN 203013077 U CN203013077 U CN 203013077U
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- China
- Prior art keywords
- post
- resistance
- resistance wire
- base plate
- electrical work
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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.)
- Expired - Fee Related
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Abstract
An electrical work research instrument is characterized by comprising a base plate, a left post, a central post and a right post fixed on the base plate, terminals respectively fixed on the three post, a left resistance wire fixed between the left post and the central post through the terminals, a right resistance wire fixed between the central post and the right post through the terminals, and balloons clamped between the left resistance wire and the base plate and between the right resistance wire and the base plate. The resistance values of the left and right resistance wires are different and linear. The detonation sequence of the balloons due to powering on and heating of the resistance wires indicates the magnitude of electric work, electric power and heat generated. The electrical work research instrument is obvious in effect, rapid in experiment process, uniform in heat radiation, reliable and stable in phenomenon, good in repeatability, convenient for operation, simple in structure and low in cost. The electrical work research instrument is widely applicable to experiments of electric work, electric power and Joule s laws and has a promising prospect for promotion and application.
Description
Affiliated technical field
The utility model relates to a kind of instruments used for education of electricity of middle school physical part, is specially the electric work research apparatus.
Background technology
In Shanghai Edition junior physics teaching material, the research current work experimental program relevant from which factor is: insert two resistance wires that resistance is different in wide-necked bottle, the kerosene of the quality such as dress and insert thermometer in bottle, during series connection, how much and the relation between voltage the research current work; When in parallel the research current work what with the relation of size of current.This is the difficult point experiment of Middle School Physics, the one, and the power of Resistant heating is little, the time is long, and kerosene is many, temperature variation is little, and the teacher is afraid to do sth; The 2nd, the student can't see that the registration of thermometer changes, and the kerosene temperature variation is invisible again, and student's interest is low.
The utility model content
The purpose of this utility model is: the electric work that a kind of experimental phenomena is obvious, visibility is large research apparatus is provided.
The technical solution of the utility model is: a kind of electric work research apparatus, comprise two resistance wires that resistance value is different, it is characterized in that: further comprising three vertical rods, described three vertical rods be positioned at the middle part cross bar, be positioned at the bottom base be fixedly connected with, the upper bore of described every vertical rod also is connected with binding post, be connected with described two resistance wires between described three binding posts, described resistance wire is linearly, accompanies respectively two balloons between described two resistance wires and cross bar.
Size, the material of described two balloons are identical.
After adopting said structure, because balloon is close on resistance wire, resistance wire generates heat burning balloon top layer, thereby ignites balloon.The explanation current work of first igniting balloon is many, generates heat also many.
The beneficial effects of the utility model are: with the priority that balloon is ignited in the resistance wire heating, represent the size of electric work, phenomenon is obvious, and full class as seen; Resistance wire is linearly, and heat radiation is even, and effect stability is reliable, good reproducibility; " bang " scaring sound in, student's interest is high; Several seconds can be ignited balloon, and experiment is fast; Popularizing application prospect is wide.
Description of drawings
Fig. 1 is cut-open view of the present utility model;
In figure: 1. base, 2. vertical rod, 3. bolt, 4. cross bar, 5. binding post, 6. resistance wire, 7. balloon.
Embodiment
As shown in Figure 1, base 1 perforate is fixed three vertical rods 2 with insertion, vertical rod 2 at the middle part again perforate be connected with cross bar 4 by bolt 3, the top perforate of vertical rod 2 is fixed with binding post 5, binding post 5 can add nut by screw rod and consist of.Be connected with two resistance wires 6 that resistance is different between three binding posts 5, every resistance wire 6 consists of the space of blocking balloon with the cross bar of below.
Adopt three above-mentioned vertical rods, raised the height of resistance wire and balloon, utilize observation of students.
Claims (2)
1. electric work research apparatus, comprise two resistance wires that resistance value is different, it is characterized in that: further comprising three vertical rods, described three vertical rods be positioned at the middle part cross bar, be positioned at the bottom base be fixedly connected with, the upper bore of described every vertical rod also is connected with binding post, be connected with described two resistance wires between described three binding posts, described resistance wire is linearly, accompanies respectively two balloons between described two resistance wires and cross bar.
2. electric work research apparatus as claimed in claim 1, it is characterized in that: size, the material of described two balloons are identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220630536 CN203013077U (en) | 2012-11-26 | 2012-11-26 | Electrical work research instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220630536 CN203013077U (en) | 2012-11-26 | 2012-11-26 | Electrical work research instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203013077U true CN203013077U (en) | 2013-06-19 |
Family
ID=48604649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220630536 Expired - Fee Related CN203013077U (en) | 2012-11-26 | 2012-11-26 | Electrical work research instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203013077U (en) |
-
2012
- 2012-11-26 CN CN 201220630536 patent/CN203013077U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20131126 |