CN202126785U - Tester for Faraday's electromagnetic induction law - Google Patents
Tester for Faraday's electromagnetic induction law Download PDFInfo
- Publication number
- CN202126785U CN202126785U CN2011202010457U CN201120201045U CN202126785U CN 202126785 U CN202126785 U CN 202126785U CN 2011202010457 U CN2011202010457 U CN 2011202010457U CN 201120201045 U CN201120201045 U CN 201120201045U CN 202126785 U CN202126785 U CN 202126785U
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- faraday
- electromagnetic induction
- induction law
- tester
- fixed pulley
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Abstract
The utility model relates to a teaching instrument, in particular to a tester for Faraday's electromagnetic induction law, which is characterized by comprising a vertical groove (2) and an oscilloscope (4). A fixed pulley is installed above the vertical groove (2), a magnet (3) is hung on the fixed pulley through a rope (1), a base (6) is arranged under the vertical groove (2), and an induction coil is installed in the base (6). Two input ends of the oscilloscope (4) are respectively connected with two ends of the induction coil in electric mode. By adopting the technical scheme, the tester for Faraday's electromagnetic induction law is simple in structure, low in manufacturing cost, simple in experiment operations, visual in experiment phenomena and particularly suitable for physics teaching in senior high schools.
Description
Technical field
The utility model relates to a kind of instruments used for education, especially Faraday's electromagnetic induction law checking appearance.
Background technology
When religion, Faraday's electromagnetic induction law, adopt qualitative experiment more at present, make observation of students fast to magnetic flux change, it is big to produce induction electromotive force; Magnetic flux change is slow, and it is little to produce induction electromotive force.China begins contrived experiment from the 1980s, application experiment comes the quantitative verification Faraday's electromagnetic induction law.The difficult point of key breakthrough is the measurement of variation rate of magnetic flux in the design, and most principles that adopt are that to pass coil flux amount variable quantity in certain process of control constant, the time of measuring magnetic flux change in the coil, thus measure variation rate of magnetic flux.Also there is minority to utilize coil at the uniform velocity to pass uniform magnetic field, measures the size of the motional electromotive force of coil two ends generation.
Adopt the movement velocity of Motor Control coil or magnet in the experiment; Photogate is measured the speed of coil or magnet movement; Sensor is collected the velocity information of coil or magnet movement.With the induction electromotive force that produces in the measurement closed circuits such as digital oscilloscope, voltage sensor.
More than experiment is all accomplished in the Experiment of College Physics chamber mostly, is not used in the senior middle school physics teaching.And use therein photogate, sensor etc., circuit complex connection, their principle are understood relatively difficulty for the high school student.Adding Faraday's electromagnetic induction law itself is exactly a difficult point, so the experimental applications that these instruments are formed has increased student's burden to the classroom, effect is bad on the contrary.
The utility model content
The purpose of the utility model provides a kind of Faraday's electromagnetic induction law checking appearance, and it is simple to operate, realizes the phenomenon visual sense, verifies effective and with low cost.
For realizing above-mentioned purpose, the technical scheme that the utility model adopts is:
A kind of Faraday's electromagnetic induction law checking appearance, its special feature is, comprises a vertical slots; One fixed pulley is installed above this vertical slots; One magnet is hung on fixed pulley through rope, below this vertical slots, is provided with a base, and an inductive coil is installed in this base; Also comprise an oscillograph, these oscillographic two input ends are electrically connected with the two ends of this inductive coil respectively.
Wherein oscillographic " X " input end with " " end be electrically connected with the two ends of this inductive coil respectively.
Adopt the Faraday's electromagnetic induction law checking appearance of technique scheme, simple in structure, cheap for manufacturing cost, and simple to operate when experiment, experimental phenomena is directly perceived, especially is fit to school of senior middle school physics teaching.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model.
Embodiment
Come the utility model is done further detailed explanation below in conjunction with accompanying drawing:
As shown in Figure 1, a kind of Faraday's electromagnetic induction law checking appearance comprises a vertical slots 2; Above this vertical slots 2, a fixed pulley is installed; One magnet 3 is hung on fixed pulley through rope 1, below this vertical slots 2, is provided with a base 6, in this base 6, an inductive coil is installed; Also comprise an oscillograph 4, " X " input end of this oscillograph 4 with " " end be electrically connected with the two ends of this inductive coil respectively.
The method of application of the utility model is following, at first changes oscillograph 4 screen scales in proportion to be drawn as voltage registration form, specifically regulates oscillograph 4 and is shown as a bright spot; Move to the leftmost side to bright spot with left and right sides translation knob; Signal input connect respectively " X " input end with " " end, insert a joint 1.5V dry cell earlier, regulate the X gain; Make bright spot (be oscillograph 4 screens midway from left to right, can on screen, indicate) with pen or alternate manner to the 1.5V position; The two joint dry cells of connecting then, the bright spot 3V position (be oscillograph 4 screen right-most position places,, can regulate repeatedly) of arriving if deviation is arranged, oscillograph 4 just repacks the instrument of a measuring voltage into like this.
During measurement, through rope 1 magnet 3 is mentioned, there is scale vertical slots 2 sides, and record magnet 3 is apart from the inductive coil surface height.Highly freely discharge magnet 3 from magnet 3 places, the maximal value of the induction electromotive force that produces in the experiment this time of the scale farthest that the bright spot that shows on observation oscilloscope 4 screens simultaneously moves, record on screen.Measure many group experimental datas,, can obtain the relation of induction electromotive force and variation rate of magnetic flux through the formula manipulation data.
Utilize above experiment, the height of controlling magnet 3 whereabouts is constant again, changes the number of turn of inductive coil, measures the size of induction electromotive force, just obtains the relation between induction electromotive force and the number of inductive coil turns.
Claims (2)
1. a Faraday's electromagnetic induction law is verified appearance; It is characterized in that: comprise a vertical slots (2), in this vertical slots (2) top one fixed pulley is installed, a magnet (3) is hung on fixed pulley through rope (1); Be provided with a base (6) in this vertical slots (2) below; In this base (6), an inductive coil is installed, also comprises an oscillograph (4), two input ends of this oscillograph (4) are electrically connected with the two ends of this inductive coil respectively.
2. Faraday's electromagnetic induction law as claimed in claim 1 checking appearance is characterized in that: wherein " X " input end of oscillograph (4) with " " end is electrically connected with the two ends of this inductive coil respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202010457U CN202126785U (en) | 2011-06-15 | 2011-06-15 | Tester for Faraday's electromagnetic induction law |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202010457U CN202126785U (en) | 2011-06-15 | 2011-06-15 | Tester for Faraday's electromagnetic induction law |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202126785U true CN202126785U (en) | 2012-01-25 |
Family
ID=45489851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202010457U Expired - Fee Related CN202126785U (en) | 2011-06-15 | 2011-06-15 | Tester for Faraday's electromagnetic induction law |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202126785U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133184A (en) * | 2014-08-18 | 2014-11-05 | 哈尔滨翔科新材料有限公司 | Non-destructive test method and device for average magnetic field intensity of permanent magnet |
| CN104155618A (en) * | 2014-08-18 | 2014-11-19 | 哈尔滨翔科新材料有限公司 | No damage test device of permanent magnet magnetic field intensity |
| CN107358849A (en) * | 2017-08-21 | 2017-11-17 | 西华师范大学 | Lenz's law, Faraday's electromagnetic induction law analytical demonstrator |
| CN109036048A (en) * | 2018-10-13 | 2018-12-18 | 苏州科技大学 | A kind of experimental provision and its experimental method of Faraday's electromagnetic induction law |
| CN114596763A (en) * | 2022-03-16 | 2022-06-07 | 滁州职业技术学院 | Physical teaching experimental device based on electromagnetic induction |
-
2011
- 2011-06-15 CN CN2011202010457U patent/CN202126785U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133184A (en) * | 2014-08-18 | 2014-11-05 | 哈尔滨翔科新材料有限公司 | Non-destructive test method and device for average magnetic field intensity of permanent magnet |
| CN104155618A (en) * | 2014-08-18 | 2014-11-19 | 哈尔滨翔科新材料有限公司 | No damage test device of permanent magnet magnetic field intensity |
| CN104155618B (en) * | 2014-08-18 | 2017-02-01 | 哈尔滨翔科新材料有限公司 | No damage test device of permanent magnet magnetic field intensity |
| CN107358849A (en) * | 2017-08-21 | 2017-11-17 | 西华师范大学 | Lenz's law, Faraday's electromagnetic induction law analytical demonstrator |
| CN109036048A (en) * | 2018-10-13 | 2018-12-18 | 苏州科技大学 | A kind of experimental provision and its experimental method of Faraday's electromagnetic induction law |
| CN114596763A (en) * | 2022-03-16 | 2022-06-07 | 滁州职业技术学院 | Physical teaching experimental device based on electromagnetic induction |
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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: 20120125 Termination date: 20170615 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |