CN220895067U - Multifunctional demonstration instrument for ohm law of closed circuit - Google Patents
Multifunctional demonstration instrument for ohm law of closed circuit Download PDFInfo
- Publication number
- CN220895067U CN220895067U CN202321604146.8U CN202321604146U CN220895067U CN 220895067 U CN220895067 U CN 220895067U CN 202321604146 U CN202321604146 U CN 202321604146U CN 220895067 U CN220895067 U CN 220895067U
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- Prior art keywords
- voltmeter
- copper
- plate
- polar plate
- switch
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- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000000523 sample Substances 0.000 claims description 12
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 4
- 210000000056 organ Anatomy 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910000366 copper(II) sulfate Inorganic materials 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Primary Cells (AREA)
Abstract
The utility model provides a multifunctional demonstration instrument for ohm law of a closed circuit, and particularly relates to the technical field of physical teaching equipment. The utility model provides a multi-functional demonstration appearance of closed circuit ohm' S law, includes circuit panel, is provided with copper zinc polar plate, buzzer, slide rheostat, switch S1, switch S2, switch S3, voltmeter V1, voltmeter V2 through the wire connection on the circuit panel, and copper zinc polar plate middle part is provided with open type reaction tank. The utility model has the beneficial effects that: the utility model explores the influence of the internal resistance change of the primary battery on the circuit current by means of the buzzer, so that students can understand the influence of the internal resistance change of the battery on the circuit current deeply, the voltmeter or the voltage sensor can easily measure the change of the electric potentials of each point inside and outside the battery, the rise and fall of the electric potential inside the primary battery are explored by means of the voltage sensor, and the ohm law of the closed circuit is verified by means of the voltage sensor.
Description
Technical Field
The utility model mainly relates to the technical field of physical teaching equipment, in particular to a multifunctional demonstration instrument for ohm law of a closed circuit.
Background
The multifunctional demonstration instrument for the ohm law of the closed circuit is mainly used for explaining the 'ohm law of the closed circuit' of section 2 of the twelfth chapter of the must-repair of physics in high school.
The battery with variable internal resistance in the market is only one, but the battery is closed, only two electrodes and two probes are used, electrolyte is pressurized by an inflator, the solution between the electrodes is changed to change the internal resistance, the battery device in the market is closed, the function is single, the potential of each point in the battery can not be detected, the traditional closed circuit ohm law experimental device can not know the change of the potential of each point in the battery and the external point, the problem that the inside of the dry battery can not be seen and the students can not feel the situation exists, and students have great difficulty in understanding the internal voltage and the external voltage, especially the lifting of the internal potential of the battery, so the utility model provides the closed circuit ohm law multifunctional demonstration instrument.
Disclosure of utility model
In order to solve the defects of the prior art, the utility model provides a multifunctional demonstration instrument for ohm law of a closed circuit.
The utility model aims to achieve the aim, and the aim is achieved by the following technical scheme:
The utility model provides a multi-functional demonstration appearance of closed circuit ohm' S law, includes circuit panel, its characterized in that, be provided with copper zinc polar plate, bee calling organ, slide rheostat, switch S1, switch S2, switch S3, voltmeter V1, voltmeter V2 through the wire connection on the circuit panel, copper zinc polar plate middle part is provided with open reaction tank, be provided with the cupric sulfate solution in the reaction tank, copper zinc polar plate and voltmeter V1, slide rheostat, bee calling organ establish ties into the return circuit through the switch respectively, the positive plate at copper zinc polar plate is connected to voltmeter V1 one end, the negative plate at copper zinc polar plate is connected to the voltmeter V1 other end, be provided with the probe between two polar plates of copper zinc polar plate, the probe is connected with voltmeter V2.
And a copper sulfate solution and a copper-zinc plate are added into the reaction tank to form a primary cell.
The positive plate of the copper-zinc polar plate is a copper plate, and the negative plate of the copper-zinc polar plate is a zinc plate.
Compared with the prior art, the utility model has the beneficial effects that:
The utility model explores the influence of the internal resistance change of the primary battery on the circuit current by means of the buzzer, switches on the switch S1, sounds the buzzer, makes the electrode A, B close, makes the sound of the buzzer more and more sharp, indicates that the current is becoming larger, indicates that the internal resistance of the battery is becoming smaller, and can easily detect the change of the electric potentials of each point inside and outside the battery by means of the voltmeter or the voltage sensor, so that students can understand the influence of the internal resistance change of the battery on the circuit current more deeply, explore the rise and fall of the electric potential inside the primary battery by means of the voltage sensor, and detect the internal voltage and the external voltage by means of the voltage sensor, thereby verifying the ohm law of the closed circuit.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.
The reference numbers shown in the drawings: 1. a circuit panel; 2. copper zinc electrode plate; 3. a buzzer; 4. a slide rheostat; 5. a switch S1; 6. a switch S2; 7. a switch S3; 8. a voltmeter V1; 9. a voltmeter V2; 10. a probe; 11. a reaction tank.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and specific embodiments. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it will be understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the utility model, and equivalents thereof fall within the scope of the utility model as defined by the claims.
Standard parts used in the utility model can be purchased from the market, special-shaped parts can be customized according to the description of the specification and the drawings, the specific connection modes of the parts adopt conventional means such as mature bolts, rivets, welding, pasting and the like in the prior art, and meanwhile, in order to clearly express the connection relation and working principle among the components, the drawings of the specification are arranged and drawn in a mode of a mechanism motion diagram, and are not described in detail.
As shown in fig. 1, the multifunctional demonstration instrument for the ohm law of the closed circuit comprises a circuit panel, wherein a copper-zinc polar plate, a buzzer, a sliding rheostat, a switch S1, a switch S2, a switch S3, a voltmeter V1 and a voltmeter V2 which are connected through wires are arranged on the circuit panel, an open reaction tank is arranged in the middle of the copper-zinc polar plate, a copper sulfate solution is arranged in the reaction tank, the copper-zinc polar plate, the voltmeter V1, the sliding rheostat and the buzzer are respectively connected in series to form a loop through the switch, one end of the voltmeter V1 is connected with a positive plate of the copper-zinc polar plate, the other end of the voltmeter V1 is connected with a negative plate of the copper-zinc polar plate, a probe is arranged between the two polar plates of the copper-zinc polar plate, and the probe is connected with the voltmeter V2.
Furthermore, copper sulfate solution and copper-zinc polar plates are added into the reaction tank to form a primary cell.
Further, the positive plate of the copper-zinc polar plate is a copper plate, and the negative plate of the copper-zinc polar plate is a zinc plate.
The implementation steps of this embodiment are:
1. The influence of the change of the internal resistance of the primary battery on the circuit current is explored, the circuit shown in the figure 1 is connected, the switch S1 is turned on, the buzzer sounds, the electrode A, B is close, the sound of the buzzer is more and more sharp, the current is increased, and the internal resistance of the battery is decreased. The experiment enables students to understand the influence of the internal resistance change of the battery on the circuit current more deeply.
2. Detecting the rise and fall of the internal potential of the primary battery, connecting a circuit shown in the figure 1, connecting a voltage sensor, ① sliding a slide rheostat slide sheet to the rightmost end, opening switches S1 and S3, closing a switch S2, fixing a black probe D near the positive electrode of the battery, enabling a red probe C to move towards a negative plate, enabling a voltage representation number to be positive and increase, indicating that in the power supply, current flows from the negative electrode to the positive electrode, and the potential is reduced along the current direction; ② When the red probe C touches the negative plate without changing the position of the black probe D, the number of the voltmeter suddenly changes from a positive value to a negative value, and the change is large, indicating that there is a sudden change in potential near the zinc plate. Through the experiment, students can more intuitively and deeply know the internal potential elevation pattern of the battery.
3. Verifying ohm' S law of the closed circuit, connecting the circuit shown in fig. 1, sliding the slide rheostat slide to the rightmost end, opening switch S 1、S2, closing switch S 3, and displaying a voltage value on the computer, wherein the voltage value represents the battery electromotive force. Then closing S 2, slowly pushing the sliding vane leftwards, reducing the resistance value of the sliding rheostat, and simultaneously obtaining the values of the road end voltage u 1 and the internal voltage u 2 from the two sensors to obtain a conclusion: as the external resistance decreases, the terminal voltage u 1 decreases gradually, the internal voltage u 2 increases gradually, and the sum of the internal and external voltages remains unchanged within the allowable error range, which is always equal to the power supply electromotive force.
Claims (3)
1. The utility model provides a multi-functional demonstration appearance of closed circuit ohm' S law, includes circuit panel, its characterized in that, be provided with copper zinc polar plate, bee calling organ, slide rheostat, switch S1, switch S2, switch S3, voltmeter V1, voltmeter V2 through the wire connection on the circuit panel, copper zinc polar plate middle part is provided with open reaction tank, be provided with the cupric sulfate solution in the reaction tank, copper zinc polar plate and voltmeter V1, slide rheostat, bee calling organ establish ties into the return circuit through the switch respectively, the positive plate at copper zinc polar plate is connected to voltmeter V1 one end, the negative plate at copper zinc polar plate is connected to the voltmeter V1 other end, be provided with the probe between two polar plates of copper zinc polar plate, the probe is connected with voltmeter V2.
2. The multifunctional demonstration instrument for ohm law of closed circuit according to claim 1, wherein a copper sulfate solution and a copper zinc polar plate are added into the reaction tank to form a primary cell.
3. The closed circuit ohm law multifunctional demonstrator of claim 1, wherein the positive plate of the copper-zinc polar plate is a copper plate and the negative plate of the copper-zinc polar plate is a zinc plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321604146.8U CN220895067U (en) | 2023-06-21 | 2023-06-21 | Multifunctional demonstration instrument for ohm law of closed circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321604146.8U CN220895067U (en) | 2023-06-21 | 2023-06-21 | Multifunctional demonstration instrument for ohm law of closed circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220895067U true CN220895067U (en) | 2024-05-03 |
Family
ID=90868716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321604146.8U Active CN220895067U (en) | 2023-06-21 | 2023-06-21 | Multifunctional demonstration instrument for ohm law of closed circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220895067U (en) |
-
2023
- 2023-06-21 CN CN202321604146.8U patent/CN220895067U/en active Active
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