CN202711549U - Teaching board for demonstrating characteristic of changing of conductor resistor with humidity - Google Patents
Teaching board for demonstrating characteristic of changing of conductor resistor with humidity Download PDFInfo
- Publication number
- CN202711549U CN202711549U CN 201220291722 CN201220291722U CN202711549U CN 202711549 U CN202711549 U CN 202711549U CN 201220291722 CN201220291722 CN 201220291722 CN 201220291722 U CN201220291722 U CN 201220291722U CN 202711549 U CN202711549 U CN 202711549U
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Abstract
The utility model provides a teaching board for demonstrating a characteristic of changing of conductor resistor with humidity. The teaching board comprises a board, a 24-V power supply, a diode A, an amperemeter A, a 220-V lamp, a diode D, a switch K1, a diode B, a switch K2, a 220-V power socket, and a diode C. The collector of the diode A is connected with the 24-V power supply and the emitter is connected with the amperemeter; the amperemeter is connected with the 220-V lamp that is connected with the collector of the diode D; the emitter of the diode D is connected with the switch K1 that is connected with the cathode of the 24-V power supply; the emitter of the diode B is connected with the amperemeter and the collector is connected with the switch K2; the switch K2 is connected with one electrode of the alternating current socket and the other electrode of the alternating current socket is connected with the collector of the diode C; and the emitter of the diode C is connected with the collector of the diode D. According to the utility model, the abstract and elusive characteristic of changing of a conductor resistor with humidity can be demonstrated to students, so that the complicated and elusive physical conception becomes vivid and visual.
Description
Technical field
The utility model design educational facilities field provides a kind of conductor resistance with humidity variation characteristic teaching demonstration plate.
Background technology
The charge and discharge process student of capacitor often feels abstract hard to understand, and observe the effect of charge and discharge phenomena of capacitor with conventional lecture experiment not fully up to expectations.If come the charge and discharge phenomena of demonstrating electrical container with light emitting diode, just can produce image, effect intuitively.Slightly make improvements again, increase one or several electric capacity, can also finish the demonstration of capacitor in series and parallel.
Summary of the invention
The purpose of this utility model is to provide a kind of conductor resistance with humidity variation characteristic teaching demonstration plate.
The utility model is for achieving the above object by the following technical solutions:
A kind of conductor resistance is characterized in that with humidity variation characteristic teaching demonstration plate: comprise plank, be arranged on 24V power supply, diode A, reometer A, 220V electric light, diode D, K switch 1, diode B, K switch 2,220V supply socket, diode C on the plank;
The collector of described diode A is connected with the 24V power supply, emitter is connected with reometer A, and reometer A is connected with 220V electric light one end, and the 220V electric light other end connects the collector of diode D, the emitter of diode D connects K switch 1, and K switch 1 connects the negative pole of 24V power supply; The emitter of described diode B meets reometer A, and collector connects K switch 2, and K switch 2 connects a utmost point of 220V supply socket, and another utmost point of 220V supply socket connects the collector of diode C, and the emitter of diode C connects the collector of diode D;
The described plank back side be provided with for the magnetic stripe of magnet board absorption.
The beneficial effects of the utility model:
One, the utility model is existing to the student with the demonstration of humidity variation characteristic with abstract conductor resistance hard to understand, and is so that intricate physical concept becomes vivid, directly perceived.
Two, the utility model can be adsorbed on the magnet board by the magnetic stripe that arranges on the plank, makes things convenient for observation of students.
Description of drawings
Fig. 1 is circuit diagram of the present utility model.
Embodiment
A kind of conductor resistance is characterized in that with humidity variation characteristic teaching demonstration plate: comprise plank, be arranged on 24V power supply, diode A, reometer A, 220V electric light, diode D, K switch 1, diode B, K2,220V supply socket, diode C that plank is hindered;
The collector of described diode A is connected with the 24V power supply, and emitter is connected with reometer, and reometer is connected with 220V electric light one end, and the 220V electric light other end connects the collector of diode D, and the emitter of diode D connects K switch 1, and K switch 1 connects the negative pole of 24V power supply; The emitter of described diode B connects reometer, and collector connects K switch 2, and K switch 2 connects a utmost point of AC socket, and another utmost point of AC socket connects the collector of diode C, and the emitter of diode C connects the collector of diode D.
The described plank back side be provided with for the magnetic stripe of magnet board absorption.
Closing Switch K1 in the demonstration, ammeter pointer deflection, incandescent lamp conducts electricity but is not luminous, writes down the reometer reading.
K switch 1 disconnects, Closing Switch K2 two minutes, and incandescent lamp is luminous, and filament temperature raises.Disconnect again K2, rapid closing K1, the incandescent lamp conduction, ammeter pointer deflection takes reading.Along with incandescent lamp filament temperature reduces, the ammeter pointer deflection angle constantly reduces, and reading is more and more less.Thus checking, after incandescent lamp was luminous, filament temperature was high, and resistance is little, and current value is large.Along with temperature reduces, it is large that resistance becomes, and electric current constantly reduces.
Claims (1)
1. a conductor resistance is characterized in that with humidity variation characteristic teaching demonstration plate: comprise plank, be arranged on 24V power supply, diode A, reometer A, 220V electric light, diode D, K switch 1, diode B, K switch 2,220V supply socket, diode C on the plank;
The collector of described diode A is connected with the 24V power supply, emitter is connected with reometer A, and reometer A is connected with 220V electric light one end, and the 220V electric light other end connects the collector of diode D, the emitter of diode D connects K switch 1, and K switch 1 connects the negative pole of 24V power supply; The emitter of described diode B meets reometer A, and collector connects K switch 2, and K switch 2 connects a utmost point of 220V supply socket, and another utmost point of 220V supply socket connects the collector of diode C, and the emitter of diode C connects the collector of diode D;
The described plank back side be provided with for the magnetic stripe of magnet board absorption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220291722 CN202711549U (en) | 2012-06-20 | 2012-06-20 | Teaching board for demonstrating characteristic of changing of conductor resistor with humidity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220291722 CN202711549U (en) | 2012-06-20 | 2012-06-20 | Teaching board for demonstrating characteristic of changing of conductor resistor with humidity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202711549U true CN202711549U (en) | 2013-01-30 |
Family
ID=47591830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220291722 Expired - Fee Related CN202711549U (en) | 2012-06-20 | 2012-06-20 | Teaching board for demonstrating characteristic of changing of conductor resistor with humidity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202711549U (en) |
-
2012
- 2012-06-20 CN CN 201220291722 patent/CN202711549U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20140620 |
|
| EXPY | Termination of patent right or utility model |