CN204143720U - The stress demonstrating teaching aid of electrical conductor in magnetic field - Google Patents
The stress demonstrating teaching aid of electrical conductor in magnetic field Download PDFInfo
- Publication number
- CN204143720U CN204143720U CN201420453431.9U CN201420453431U CN204143720U CN 204143720 U CN204143720 U CN 204143720U CN 201420453431 U CN201420453431 U CN 201420453431U CN 204143720 U CN204143720 U CN 204143720U
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- CN
- China
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- light emitting
- emitting diode
- magnetic field
- teaching aid
- electrical conductor
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Abstract
The utility model discloses the stress demonstrating teaching aid of a kind of electrical conductor in magnetic field, comprise the master switch, power supply, the current reverser that connect successively, between master switch and current reverser, be serially connected with coil, coil is serially connected with light emitting diode group; Light emitting diode group comprises light emitting diode a, light emitting diode b, light emitting diode a and the reversal connection of light emitting diode b both positive and negative polarity in parallel.The stress demonstrating teaching aid of the utility model electrical conductor in magnetic field does not need rewiring when changing direction of current, and direction of current can be seen intuitively by light emitting diode group, this demonstration teaching aid use telescopic support of droping to the ground can arbitrarily regulate demonstration height, easy to carry.
Description
Technical field
The utility model belongs to teaching aid technical field, relates to the stress demonstrating teaching aid of a kind of electrical conductor in magnetic field.
Background technology
The teaching aid that existing demonstration electrical conductor is stressed in magnetic field, needs rewiring when changing direction of current, dumb, and sense of current can not show very intuitively, and when testing, the size of electric current also cannot change, and teaching efficiency is not good.
Utility model content
The purpose of this utility model is to provide the stress demonstrating teaching aid of a kind of electrical conductor in magnetic field, can change sense of current in conductor flexibly and see direction of current intuitively.
The technical scheme that the utility model adopts is, the stress demonstrating teaching aid of a kind of electrical conductor in magnetic field, comprise the master switch, power supply, the current reverser that connect successively, between master switch and current reverser, be serially connected with coil, coil is serially connected with light emitting diode group; Light emitting diode group comprises light emitting diode a, light emitting diode b, light emitting diode a and the reversal connection of light emitting diode b both positive and negative polarity in parallel.
Feature of the present utility model is also,
Potentiometer and micro-letter reometer is also serially connected with between master switch and coil.
Light emitting diode group two ends on coil are also connected to shorted diode switch, are serially connected with sensitive galvanometer, sensitive galvanometer and coils from parallel connection of coils between master switch and current reverser.
The voltage of power supply is 6V.
Light emitting diode a and light emitting diode b are high-brightness light emitting diode and both colors are different.
Sensitive galvanometer is double pendulum type sensitive galvanometer.
Coil is fixed on support by crocodile clip.
Support is telescopic support of droping to the ground.
The beneficial effects of the utility model are: in the application, current reverser can change sense of current in conductor flexibly, does not need rewiring; Sense of current in the expression coil that can be understood by light emitting diode group; Potentiometer can the size of electric current in control circuit flexibly; Sensitive galvanometer shows faradic size accurately; Telescopic support of droping to the ground arbitrarily can regulate experimental demonstration height, easy to carry.
Accompanying drawing explanation
Fig. 1 is the structural representation of the stress demonstrating teaching aid of the utility model electrical conductor in magnetic field.
In figure, 1. master switch, 2. power supply, 3. current reverser, 4. coil, 5. light emitting diode a, 6. light emitting diode b, 7. shorted diode switch, 8. miniature reometer, 9. potentiometer, 10. sensitive galvanometer, 11. crocodile clips, 12. supports, 13. horseshoe magnets.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
The stress demonstrating teaching aid of the utility model electrical conductor in magnetic field, structure as shown in Figure 1, comprise power supply 2, current reverser 3 that the master switch 1, the voltage that connect successively are 6V, be serially connected with coil 4 between master switch 1 and current reverser 3, coil 4 be serially connected with light emitting diode group; Light emitting diode group comprises light emitting diode a5, light emitting diode b6 in parallel, and light emitting diode a5 and the reversal connection of light emitting diode b6 both positive and negative polarity, light emitting diode a5 and light emitting diode b6 are high-brightness light emitting diode and both colors are different.Potentiometer 9 and miniature reometer 8 is also serially connected with between master switch 1 and coil 4.Light emitting diode group two ends on coil 4 are also connected to shorted diode switch 7, and be serially connected with double pendulum type sensitive galvanometer 10 between master switch 1 and current reverser 3, double pendulum type sensitive galvanometer 10 is in parallel with coil 4.Coil 4 is fixed on telescopic droping to the ground on support 12 by crocodile clip 11.
During demonstration, first by the limit of horseshoe magnet 13 through coil 4, then closed master switch 1, the size being carried out electric current in regulating circuit by regulator potentiometer 9 (shows by the miniature reometer 8 in circuit the size that potentiometer regulates electric current in rear circuit, electric current is crossed conference and is burnt light emitting diode group), after being adjusted to suitable electric current, a direction is stirred current reverser 3 (during beginning, current reverser 3 is in centre position wherein, namely sense of current is not controlled), now can see that one of them light emitting diode of light emitting diode group is bright, coil 4 moves to the curved portions of horseshoe magnet 13 simultaneously, stir current reverser 3 to another direction, see that in light emitting diode group, another light emitting diode is bright, coil 4 moves to the peristome of horseshoe magnet 13 simultaneously.The stress demonstrating teaching aid of the utility model electrical conductor in magnetic field utilizes the unilateral conduction of light emitting diode, in conjunction with current reverser 3, what student can be allowed to understand observes sense of current in electrical conductor, and see the difference of direction of current, the direction of motion of coil 4 is different, namely sees stressed in magnetic field of electrical conductor very intuitively.
Connect double pendulum type sensitive galvanometer 10, the closed shorted diode switch 7 (now light emitting diode group is shorted) in parallel with light emitting diode group, coil 4 is stirred to the curved portions of horseshoe magnet 13 with hand, can see that the pointer of double pendulum type sensitive galvanometer 10 is flapped toward side, and display size of current now; Stir coil 4 with hand to the peristome of horseshoe magnet 13, can see that the pointer of double pendulum type sensitive galvanometer 10 is flapped toward opposite side, and display size of current now.The stress demonstrating teaching aid of the utility model electrical conductor in magnetic field can allow student see the conductor faradic direction that cutting magnetic line produces in magnetic field and size very intuitively by double pendulum type sensitive galvanometer 10.
The stress demonstrating teaching aid of the utility model electrical conductor in magnetic field can be random by telescopic support 12 of droping to the ground the height of adjustment demonstration, and easy to carry.
Claims (8)
1. the stress demonstrating teaching aid of electrical conductor in magnetic field, it is characterized in that, comprise the master switch (1), power supply (2), the current reverser (3) that connect successively, be serially connected with coil (4) between master switch (1) and current reverser (3), (4) are serially connected with light emitting diode group with coil;
Light emitting diode group comprises light emitting diode a (5) in parallel, light emitting diode b (6), light emitting diode a (5) and light emitting diode b (6) both positive and negative polarity reversal connection.
2. the stress demonstrating teaching aid of electrical conductor in magnetic field according to claim 1, is characterized in that, be also serially connected with potentiometer (9) and miniature reometer (8) between described master switch (1) and coil (4).
3. the stress demonstrating teaching aid of electrical conductor in magnetic field according to claim 1, it is characterized in that, the upper light emitting diode group two ends of described coil (4) are also connected to shorted diode switch (7), be serially connected with sensitive galvanometer (10) between master switch (1) and current reverser (3), sensitive galvanometer (10) is in parallel with coil (4).
4. the stress demonstrating teaching aid of electrical conductor in magnetic field according to any one of claim 1-3, is characterized in that, the voltage of described power supply (2) is 6V.
5. the stress demonstrating teaching aid of electrical conductor in magnetic field according to claim 4, it is characterized in that, described light emitting diode a (5) and light emitting diode b (6) are for high-brightness light emitting diode and both colors are different.
6. the stress demonstrating teaching aid of electrical conductor in magnetic field according to claim 3, it is characterized in that, described sensitive galvanometer (10) is double pendulum type sensitive galvanometer.
7. the stress demonstrating teaching aid of electrical conductor in magnetic field according to claim 6, it is characterized in that, described coil (4) is fixed on support (12) by crocodile clip (11).
8. the stress demonstrating teaching aid of electrical conductor in magnetic field according to claim 7, it is characterized in that, described support (12) is telescopic support of droping to the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420453431.9U CN204143720U (en) | 2014-08-12 | 2014-08-12 | The stress demonstrating teaching aid of electrical conductor in magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420453431.9U CN204143720U (en) | 2014-08-12 | 2014-08-12 | The stress demonstrating teaching aid of electrical conductor in magnetic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204143720U true CN204143720U (en) | 2015-02-04 |
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ID=52420392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420453431.9U Expired - Fee Related CN204143720U (en) | 2014-08-12 | 2014-08-12 | The stress demonstrating teaching aid of electrical conductor in magnetic field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204143720U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110992790A (en) * | 2019-11-29 | 2020-04-10 | 天津中德应用技术大学 | Magnetic attraction type electromagnetic induction demonstration instrument |
-
2014
- 2014-08-12 CN CN201420453431.9U patent/CN204143720U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110992790A (en) * | 2019-11-29 | 2020-04-10 | 天津中德应用技术大学 | Magnetic attraction type electromagnetic induction demonstration instrument |
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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: 20150204 Termination date: 20150812 |
|
| EXPY | Termination of patent right or utility model |