CN108831265A - A kind of physical teaching aid and teaching method for electromagnetic induction demonstration - Google Patents
A kind of physical teaching aid and teaching method for electromagnetic induction demonstration Download PDFInfo
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- CN108831265A CN108831265A CN201810743034.8A CN201810743034A CN108831265A CN 108831265 A CN108831265 A CN 108831265A CN 201810743034 A CN201810743034 A CN 201810743034A CN 108831265 A CN108831265 A CN 108831265A
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- 230000005674 electromagnetic induction Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 44
- 239000010949 copper Substances 0.000 claims abstract description 44
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000011324 bead Substances 0.000 claims abstract description 26
- 230000033001 locomotion Effects 0.000 claims abstract description 12
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 22
- 230000006698 induction Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 241000237858 Gastropoda Species 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 230000005426 magnetic field effect Effects 0.000 abstract description 2
- 238000012795 verification Methods 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/181—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for electric and magnetic fields; for voltages; for currents
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Abstract
Present invention relates particularly to a kind of physical teaching aids and teaching method for electromagnetic induction demonstration, it is designed based on electromagnetic principle, provides magnetic field using U magnet, electric current is passed through by the control of rotary rheostat, the design of connector, which facilitates, changes copper rod current direction, realizes the mobile polytropism of copper rod；Using the design of worm and wormwheel, and then U-shaped magnet is driven to be rotated, and self-locking using worm screw, realize the positioning of U-shaped magnet positions, to change the position of copper rod, increased stress variation, explain demonstration and verification convenient for teacher, improve teaching efficiency；It is provided with position-limited rack in U-shaped magnet, guarantees that copper rod is in always under vertical magnetic field effect, guarantees display effect；And it is additionally arranged flat throwing component, while carrying out electromagnetic induction demonstration, push switch is opened using copper rod is mobile, the starting of electric pushrod and the motive force as bead is realized, carries out level throw motion demonstration；The stress complexity of copper rod is also increased simultaneously, further enhances teaching expansion.
Description
Technical field
The present invention relates to physics teaching teaching aid technical fields, and in particular to a kind of physics religion for electromagnetic induction demonstration
Tool and teaching method.
Background technique
Electromagnetism is important component in middle school physical curriculum, and theoretical basis therein is exactly electromagnetic induction phenomenon.
Electromagnetic induction phenomenon refers to the conductor being placed in change magnetic flux, can generate electromotive force.This electromotive force is known as incuding
Electromotive force or induced electromotive force, if this conductor is closed into primary Ioops, which can drive electronics to flow, and form induction
Electric current.However existing electromagnetism demonstration teaching aid structure is simple, has a single function, and does not adapt to the teaching of physical knowledge intercrossing, learns
Life single can only understand, teaching efficiency is caused to be restricted.
Summary of the invention
(1) the technical issues of solving
Present invention aims to overcome that the shortcomings of the prior art, and a kind of object for electromagnetic induction demonstration is provided
Teaching aid and teaching method are managed, bandwagon effect is optimized, and student is guided to carry out intercrossing teaching.
(2) technical solution
A kind of physical teaching aid for electromagnetic induction demonstration, including frame, runner assembly and electromagnetic induction component；
Frame includes pedestal and arc panel, and arc panel right end, which is connected on pedestal, forms arch, and left end is arranged straight down
There is expansion plate；
Runner assembly includes worm screw, worm gear, connecting shaft and supporting plate, and mounting rack is provided on pedestal, and worm gear is mounted on mounting rack
Top, worm screw are vertically arranged on the left of worm gear and realize self-locking, and worm screw bottom end is rotatablely connected pedestal, worm screw top be provided with from
Dynamic bevel gear, driven wheel of differential left vertical are engaged with drive bevel gear, and drive bevel gear is connected with horizontally disposed connecting shaft,
The connecting shaft other end passes through the supporting plate being fixedly connected on pedestal；
The center of circle of circle is overlapped with the worm gear center of circle where arc panel；
Electromagnetic induction component includes rotary rheostat, rechargeable power supply, U-shaped magnet position-limited rack and copper rod；Worm gear outer ring
It is connected with connecting rod, connecting rod outer end connects U-shaped magnet；Rotary rheostat and rechargeable power supply, which are fixed on, to be expanded on plate；Position-limited rack
For the bending plate structure of the U-shaped magnet of correspondence, outer end is provided with the hangers for fastening U-shaped magnet the two poles of the earth, and inner end extend into U-shaped magnet
Between；Copper rod is slidably arranged in position-limited rack, and both ends are provided with terminal；
Preferably, interlinking lever end is provided with collet, blocks U-shaped magnet；The connecting shaft other end is provided with handwheel.
Preferably, arc panel and pedestal connecting pin, arc panel and expansion plate connecting pin are provided with reinforcing rib.
Preferably, position-limited rack inner end is plane, and copper rod section is corresponding rectangle.
Preferably, position-limited rack protrudes into U-shaped magnet segment and is located at vertical magnetic field section.
Preferably, further include it is flat throw presentation component, flat presentation component of throwing includes transverse plate, electric pushrod and bead, laterally
Plate is arranged above arc panel, and one end is directly anchored to arc plate top surface, and the other end extends to the right and connects arc by strut
Plate is provided with slideway on transverse plate, and electric pushrod is arranged in slideway left end, and the telescopic end of electric pushrod is stretched out and connected to the right
There is push plate, bead is arranged in slideway, and push plate pushes bead to move horizontally along slideway.
It preferably, further include that cover and collection basket, cover are arranged on the right side of slideway, connection is extraneous on front side of cover, cover bottom
Portion, which corresponds to bead and falls region, is provided with collection basket.
Preferably, be provided with push switch on the inside of arc panel, push switch is connect with electric pushrod, position-limited rack outer end and
Arc plate spacing is greater than push switch height, and corresponding push switch is provided with protrusion at the top of copper rod.
Preferably, push switch is arranged right above worm gear.
Utilize the teaching method of above-mentioned physical teaching aid, which is characterized in that include the following steps,
Copper rod, rotary rheostat and charging type electric subject string are unified into circuit by conducting wire by S1；
S2 rotates connecting shaft, drives worm screw rotation by Bevel Gear Transmission, and then drive worm gear rotation, worm gear passes through connecting rod
U-shaped magnet rotors are driven, U-shaped magnet is adjusted to horizontal direction, adjust rotary rheostat, changes loop current size, makes
Copper rod cutting magnetic induction line generates movement, carries out electromagnetic induction demonstration, and record corresponding rheostat resistance value R at this time1；
U-shaped magnet is similarly carried out turning to inclined direction, then adjusts rotary rheostat by S3, and it is big to change loop current
It is small, make copper rod cutting magnetic induction line, moved along position-limited rack direction, realize the interleaving presentation of stress and electromagnetic induction, and records this
When corresponding rheostat resistance value R2,
S4 continues to adjust U-shaped magnet to vertical direction, then adjusts rotary rheostat and change loop current size, makes
Copper rod cutting magnetic induction line, overcomes gravity to move straight up, realizes the interleaving presentation of stress and electromagnetic induction, and records this
When corresponding rheostat resistance value R3；
S5 continues rotary rheostat, resists the protrusion of copper rod and opens push switch, and records and correspond at this time
Rheostat resistance value R4, the telescopic end of electric pushrod pushes bead to move along slideway by push plate, and bead flies from slideway right end
Out, level throw motion is done, flat throw is carried out and demonstrates, stopped and fall into collect in basket by cover after bead.
S6 compares R1、R2、R3、R4Size, and guide student to carry out reason force analysis with this.
(3) beneficial effect
The present invention provides a kind of physical teaching aids and teaching method for electromagnetic induction demonstration, have the following advantages that：
1, it is designed based on electromagnetic principle, provides magnetic field using U magnet, electric current is passed through by the control of rotary rheostat,
The design of connector, which facilitates, changes copper rod current direction, realizes the mobile polytropism of copper rod；
2, using the design of worm and wormwheel, and then U-shaped magnet is driven to be rotated, and self-locking using worm screw, realized U-shaped
The positioning of magnet positions increases stress variation to change the position of copper rod, explains demonstration and verification convenient for teacher, improves teaching
Effect；
3, it is provided with position-limited rack in U-shaped magnet, guarantees that copper rod is in always under vertical magnetic field effect, guarantees display effect
Fruit；
4, and be additionally arranged it is flat throw component, while carrying out electromagnetic induction demonstration, using the mobile opening of copper rod by pressing off
It closes, realizes the starting of electric pushrod and the motive force as bead, carry out level throw motion demonstration；Copper rod is also increased simultaneously
Stress complexity further enhances teaching expansion；
5, it is also provided with semi-open type cover and collects basket, facilitate observation of students level throw motion path, also bead is hindered
Gear and collection.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, being used required for being described below to embodiment
Attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description be only it is of the invention, protect some embodiments,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.
Structure chart when Fig. 1 is one embodiment of the invention station A；
Structure chart when Fig. 2 is one embodiment of the invention station B；
Fig. 3 is the structure chart of worm gear and worm screw in the present invention；
Structure chart when Fig. 4 is another embodiment of the present invention station C；
Structure chart when Fig. 5 is another embodiment of the present invention station D；
Structure chart when Fig. 6 is another embodiment of the present invention station E.
In attached drawing, parts list represented by the reference numerals are as follows：
1- pedestal, 2- arc panel, 3- expand plate, 4- reinforcing rib, the rotary rheostat of 5-, the rechargeable power supply of 6-, 7- snail
Bar, 701- driven wheel of differential, 8- worm gear, 801- mounting rack, 9- connecting shaft, 901- drive bevel gear, 902- handwheel, 10- supporting plate,
11- connecting rod, 12-U type magnet, 13- position-limited rack, 14- copper rod, 15- push switch, 16- transverse plate, 17- slideway, 18- strut,
19- electric pushrod, 20- push plate, 21- bead, 22- collect basket, 23- cover.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of physical teaching aid for electromagnetic induction demonstration, including frame, runner assembly and electromagnetic induction component；
Frame includes pedestal 1 and arc panel 2, and 2 right end of arc panel, which is connected on pedestal 1, forms arch, and left end is straight down
It is provided with and expands plate 3；
Runner assembly includes worm screw 7, worm gear 8, connecting shaft 9 and supporting plate 10, and mounting rack 801 is provided on pedestal 1, and worm gear 8 is pacified
Mounted in 801 top of mounting rack, worm screw 7 is vertically arranged in 8 left side of worm gear and realizes self-locking, 7 bottom end of worm screw rotation connection pedestal 1,
7 top of worm screw is provided with driven wheel of differential 701, and 701 left vertical of driven wheel of differential is engaged with drive bevel gear 901, initiative taper
Gear 901 is connected with horizontally disposed connecting shaft 9, and 9 other end of connecting shaft passes through the supporting plate 10 being fixedly connected on pedestal 1；
The center of circle of circle is overlapped with 8 center of circle of worm gear where arc panel 2；
Electromagnetic induction component includes rotary rheostat 5, rechargeable power supply 6, U-shaped magnet 12, position-limited rack 13 and copper rod
14；8 outer ring of worm gear is connected with connecting rod 11, and 11 outer end of connecting rod connects U type magnet 12；Rotary rheostat 5 and rechargeable power supply 6
It is fixed on and expands on plate 3；Position-limited rack 13 is the bending plate structure of corresponding U-shaped magnet 12, and outer end, which is provided with, fastens U-shaped magnet 12
The hangers at the two poles of the earth, inner end are extend between U-shaped magnet 12；Copper rod 14 is slidably arranged in position-limited rack 13, and both ends are provided with conducting wire
Connector.
11 end of connecting rod is provided with collet, blocks U-shaped magnet 12；9 other end of connecting shaft is provided with handwheel 902.
Position-limited rack 13 protrudes into U-shaped 12 part of magnet and is located at vertical magnetic field section.
Working principle is：
Copper rod 14, rotary rheostat 5 and rechargeable power supply 6 are connected into circuit by conducting wire；Connecting shaft 9 is rotated, is passed through
Bevel Gear Transmission drives worm screw 7 to rotate, and then worm gear 8 is driven to rotate, and worm gear 8 drives U-shaped magnet 12 to rotate by connecting rod 11,
U-shaped magnet 12 is adjusted to horizontal direction, i.e. station A, rotary rheostat 5 is adjusted, changes loop current size, makes copper rod
14 cutting magnetic induction lines generate movement, carry out electromagnetic induction demonstration, and record corresponding rheostat resistance value R at this time1；It will be U-shaped
Magnet 12 is adjusted to vertical direction, i.e. station B, then adjusts rotary rheostat 5, is changed loop current size, is cut copper rod 14
Magnetic induction line is cut, gravity is overcome to move up, realizes the interleaving presentation of stress and electromagnetic induction, and records corresponding change at this time
Hinder device resistance value R2；Compare R1、R2Size, and guide student to carry out reason force analysis with this.
Embodiment 2
The difference from the implementation 1 is that arc panel 2 is all provided with 1 connecting pin of pedestal, arc panel 2 with 3 connecting pin of plate is expanded
It is equipped with reinforcing rib 4, proof strength.
Embodiment 3
Difference from Example 2 is that 13 inner end of position-limited rack is plane, and 14 section of copper rod is corresponding rectangle, avoids
The problem of cylindrical rod itself rolls.
Embodiment 4
Difference from Example 3 is, further includes flat throwing presentation component, and flat presentation component of throwing includes transverse plate 16, electricity
Dynamic push rod 19 and bead 21, transverse plate 16 are arranged above arc panel 2, and one end is directly anchored to 2 top surface of arc panel, the other end
Extend to the right and arc panel 2 is connected by strut 18, slideway 17 is provided on transverse plate 16, electric pushrod 19 is arranged in slideway
17 left ends, electric pushrod 19 are furnished with power supply, and the telescopic end of electric pushrod 19 stretches out to the right and be connected with push plate 20, and bead 21 is set
It sets in slideway 17, push plate 20 pushes bead 21 to move horizontally along slideway 17, demonstrates for level throw motion.
Embodiment 5
Difference from Example 4 is, further includes cover 23 and collection basket 22, and cover 23 is arranged on 17 right side of slideway,
It is connected to extraneous on front side of cover 23,23 bottom of cover, which correspond to bead 21 and falls region, is provided with collection basket 22, hinders bead 21
Gear and collection.
It is wherein connected to the external world on front side of cover 23, facilitates observation of students level throw motion path.
Embodiment 6
Difference from Example 5 is, push switch 15 is provided on the inside of arc panel 2, and push switch 15 is pushed away with electronic
Bar 19 connects, and 13 outer end of position-limited rack and 2 spacing of arc panel are greater than 15 height of push switch, corresponds to push switch at the top of copper rod 14
15 are provided with protrusion, and push switch 15 realizes the starting of electric pushrod 19 and work using the protrusion of copper rod 14 as turning on the power
For the motive force of bead 21.
Embodiment 7
Difference from Example 6 is that the setting of push switch 15 is right above worm gear 8.
It since the technical effect that embodiment 7 is realized is most, is illustrated with this embodiment, that is, uses the religion of this teaching aid
Method：
Copper rod 14, rotary rheostat 5 and rechargeable power supply 6 are connected into circuit by conducting wire by S1；
S2 rotates connecting shaft 9, drives worm screw 7 to rotate by Bevel Gear Transmission, and then worm gear 8 is driven to rotate, worm gear 8 passes through
Connecting rod 11 drives U-shaped magnet 12 to rotate, and U-shaped magnet 12 is adjusted to horizontal direction, i.e. station C, rotary rheostat 5 is adjusted,
Change loop current size, make 14 cutting magnetic induction line of copper rod, generate movement, carries out electromagnetic induction demonstration, and record at this time
Corresponding rheostat resistance value R1；
S3 similarly carries out U-shaped magnet 12 to turn to inclined direction, i.e. station D, then adjusts rotary rheostat 5, changes
It becomes road size of current again, makes 14 cutting magnetic induction line of copper rod, moved along position-limited rack direction, realization stress is intersected with electromagnetic induction
Demonstration, and record corresponding rheostat resistance value R at this time2,
S4 continues to adjust U-shaped magnet 12 to vertical direction, i.e. station E, then adjusts rotary rheostat 5, changes back
Road size of current makes 14 cutting magnetic induction line of copper rod, gravity is overcome to move straight up, and realization stress is intersected with electromagnetic induction
Demonstration, and record corresponding rheostat resistance value R at this time3；
S5 continues rotary rheostat 5, resists the protrusion of copper rod 14 and opens push switch 15, and records at this time
Corresponding rheostat resistance value R4, the telescopic end of electric pushrod 19 pushes bead 21 to move along slideway 17 by push plate 20, bead 21
It flies out from 17 right end of slideway, does level throw motion, carry out flat throw and demonstrate, stopped after bead 21 by cover 23 and fall into collection
In basket 22.
S6 compares R1、R2、R3、R4Size, and guide student to carry out reason force analysis with this.
In the description of this specification, the description meaning of reference term " one embodiment ", " example ", " specific example " etc.
Refer to that specific features described in conjunction with this embodiment or example, structure, material live feature and be contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or show
Example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more embodiment or examples
In can be combined in any suitable manner.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described to the greatest extent, also do not limit the specific embodiment that the invention is only.It obviously, can according to the content of this specification
It makes many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (10)
1. a kind of physical teaching aid for electromagnetic induction demonstration, it is characterised in that：Including frame, runner assembly and electromagnetic induction group
Part；
The frame includes pedestal (1) and arc panel (2), and arc panel (2) right end is connected on pedestal (1) and forms arch, left end
It is provided with straight down and expands plate (3)；
The runner assembly includes worm screw (7), worm gear (8), connecting shaft (9) and supporting plate (10), and pedestal is provided with mounting rack on (1)
(801), worm gear (8) is mounted at the top of mounting rack (801), and worm screw (7) is vertically arranged on the left of worm gear (8) and realizes self-locking, snail
Bar (7) bottom end is rotatablely connected pedestal (1), and worm screw (7) top is provided with driven wheel of differential (701), on the left of driven wheel of differential (701)
Vertical Meshing has drive bevel gear (901), and drive bevel gear (901) is connected with horizontally disposed connecting shaft (9), and connecting shaft (9) is another
End is across the supporting plate (10) being fixedly connected on pedestal (1)；
The center of circle of circle is overlapped with worm gear (8) center of circle where the arc panel (2)；
The electromagnetic induction component includes rotary rheostat (5), rechargeable power supply (6), U-shaped magnet (12), position-limited rack (13)
And copper rod (14)；Worm gear (8) outer ring is connected with connecting rod (11), and connecting rod (11) outer end connects U-shaped magnet (12)；The rotation
Formula rheostat (5) and rechargeable power supply (6), which are fixed on, to be expanded on plate (3)；The position-limited rack (13) is corresponding U-shaped magnet (12)
Bending plate structure, outer end are provided with the hangers for fastening U-shaped magnet (12) the two poles of the earth, and inner end is extend between U-shaped magnet (12)；It is described
Copper rod (14) is slidably arranged in position-limited rack (13), and both ends are provided with terminal.
2. a kind of physical teaching aid for electromagnetic induction demonstration according to claim 1, it is characterised in that：The connecting rod
(11) end is provided with collet, blocks U-shaped magnet (12)；Connecting shaft (9) other end is provided with handwheel (902).
3. a kind of physical teaching aid for electromagnetic induction demonstration according to claim 1, it is characterised in that：The arc panel
(2) reinforcing rib (4) are provided with pedestal (1) connecting pin, arc panel (2) and expansion plate (3) connecting pin.
4. a kind of physical teaching aid for electromagnetic induction demonstration according to claim 1 or 2, it is characterised in that：The limit
Position frame (13) inner end is plane, and copper rod (14) section is corresponding rectangle.
5. a kind of physical teaching aid for electromagnetic induction demonstration according to claim 4, it is characterised in that：The position-limited rack
(13) it protrudes into U-shaped magnet (12) and is partially located at vertical magnetic field section.
6. a kind of physical teaching aid for electromagnetic induction demonstration according to claim 5, it is characterised in that：It further include flat throwing
Presentation component, the flat throwing presentation component include transverse plate (16), electric pushrod (19) and bead (21), transverse plate (16) setting
Above arc panel (2), one end is directly anchored to arc panel (2) top surface, and the other end extends to the right and connected by strut (18)
Arc panel (2) is provided with slideway (17) on transverse plate (16), and electric pushrod (19) is arranged in slideway (17) left end, electric pushrod
(19) telescopic end is stretched out to the right and is connected with push plate (20), and in slideway (17), push plate (20) pushes small for bead (21) setting
Ball (21) is moved horizontally along slideway (17).
7. a kind of physical teaching aid for electromagnetic induction demonstration according to claim 6, it is characterised in that：It further include cover
(23) and basket (22) are collected, cover (23) setting is on the right side of slideway (17), and connection is extraneous on front side of cover (23), cover (23) bottom
Corresponding bead (21) fall region and are provided with collection basket (22).
8. a kind of physical teaching aid for electromagnetic induction demonstration according to claim 7, it is characterised in that：The arc panel
(2) inside is provided with push switch (15), and push switch (15) is connect with electric pushrod (19), position-limited rack (13) outer end and arc
Plate (2) spacing is greater than push switch (15) height, and corresponding push switch (15) are provided with protrusion at the top of copper rod (14).
9. a kind of physical teaching aid for electromagnetic induction demonstration according to claim 8, it is characterised in that：It is described by pressing off
(15) setting is closed right above worm gear (8).
10. utilizing the teaching method of physical teaching aid described in claim 9, which is characterized in that include the following steps,
Copper rod (14), rotary rheostat (5) and rechargeable power supply (6) are connected into circuit by conducting wire by S1；
S2 is rotated connecting shaft (9), drives worm screw (7) rotation by Bevel Gear Transmission, and then drive worm gear (8) rotation, worm gear (8)
U-shaped magnet (12) rotation is driven by connecting rod (11), U-shaped magnet (12) is adjusted to horizontal direction, rotary rheostat is adjusted
(5), change loop current size, make copper rod (14) cutting magnetic induction line, generate movement, carry out electromagnetic induction demonstration, and record
Corresponding rheostat resistance value R at this time1；
S3 similarly carries out U-shaped magnet (12) to turn to inclined direction, then adjusts rotary rheostat (5), changes loop current
Size makes copper rod (14) cutting magnetic induction line, moves along position-limited rack direction, realizes the interleaving presentation of stress and electromagnetic induction, and remembers
Corresponding rheostat resistance value R at this time under record2,
S4 continues to adjust U-shaped magnet (12) to vertical direction, then adjusts rotary rheostat (5), and it is big to change loop current
It is small, make copper rod (14) cutting magnetic induction line, gravity is overcome to move straight up, realizes the interleaving presentation of stress and electromagnetic induction, and
Record corresponding rheostat resistance value R at this time3；
S5 continues rotary rheostat (5), resists the protrusion of copper rod (14) and opens push switch (15), and records this
When corresponding rheostat resistance value R4, the telescopic end of electric pushrod (19) is by push plate (20) promotion bead (21) along slideway (17) fortune
Dynamic, bead (21) flies out from slideway (17) right end, does level throw motion, carries out flat throw and demonstrates, by cover after bead (21)
(23) stop and fall into collect in basket (22)；
S6 compares R1、R2、R3、R4Size, and guide student to carry out reason force analysis with this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810743034.8A CN108831265B (en) | 2018-07-09 | 2018-07-09 | Physical teaching aid and teaching method for electromagnetic induction demonstration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810743034.8A CN108831265B (en) | 2018-07-09 | 2018-07-09 | Physical teaching aid and teaching method for electromagnetic induction demonstration |
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| Publication Number | Publication Date |
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| CN108831265A true CN108831265A (en) | 2018-11-16 |
| CN108831265B CN108831265B (en) | 2020-07-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111710221A (en) * | 2020-07-06 | 2020-09-25 | 薛皓元 | All-in-one experimental teaching demonstration device and demonstration method |
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