Demonstration instrument for quantitatively exploring Ampere force
By designing a quantitative exploratory ampere force size demonstration instrument, using intelligent power supply, ammeter, electronic balance and other devices, the precise measurement and display of ampere force size is achieved, which solves the problem of insufficient students' understanding caused by qualitative analysis in the existing teaching model, stimulates students' interest in exploration, and promotes the construction of physical thinking and the development of core literacy.
Patent Information
- Application Number
- CN202421633274.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The existing electrical teaching model is mainly qualitative analysis, and cannot intuitively display the magnitude of ampere force, which leads to insufficient understanding of ampere force, and the teaching model is rigid and lacks interest in exploration.
Design a quantitative exploratory amp force size demonstration instrument, including intelligent power supplies, ammeters, iron frame tables, mounters, electronic balances, coils and magnets. Through these devices, the amp force size can be accurately measured and displayed, and students can change parameters such as current, magnetic field and wire length to explore its impact on amp force size.
This device makes the experiment simple to operate, the phenomenon is clear at a glance, the data is accurate, and the error is small. It helps students deeply understand the factors influencing the magnitude of ampere force, stimulates students' interest in exploration, promotes hands-on practice and independent learning, and helps build physical thinking and core literacy.
Smart Images
Figure CN222927122U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of electrical teaching, and particularly relates to a demonstration instrument for quantitatively exploring the magnitude of Ampere force. Background Technique
[0002] Ampere force is the force exerted on a current-carrying wire in a magnetic field. It was first determined experimentally by the French physicist A. Ampere. It can be expressed as: for a straight wire with a length of L and a current intensity of I placed in a uniform external magnetic field with a magnetic induction intensity of B, the magnitude of the Ampere force on the wire is f = IBLsinα, where α is the angle between the current direction in the wire and the direction of B, and the units of f, L, I, and B are N, m, A, and T respectively. The direction of the Ampere force is perpendicular to the plane determined by the current-carrying wire and the magnetic field direction, and the directions of I, B, and F are determined by the left-hand rule. The Ampere force on any-shaped wire in a uniform magnetic field can be regarded as the vector sum of the Ampere forces on infinitely many straight current elements IΔL in the magnetic field.
[0003] In the existing experimental teaching process, only qualitative analysis can be carried out, that is, according to the known results in the textbook, after cooperating with the experiment, the analysis is carried out knowing the results in advance. It is not intuitive, cannot arouse the exploration interest of students, the memory of the formula is rigid and not deep, and students do not fully understand the Ampere force.
[0004] Therefore, a teaching tool is needed to change this teaching mode, make learning more profound and interesting, and be simple and convenient to operate and more direct to observe. Content of the Utility Model
[0005] In order to solve the above existing problems, the utility model provides a demonstration instrument for quantitatively exploring the magnitude of Ampere force.
[0006] The utility model is realized through the following technical solutions:
[0007] A demonstration instrument for quantitatively exploring the magnitude of Ampere force includes an intelligent power supply, an ammeter, an iron stand, a mounting rack, an electronic balance, a coil, and a magnet. The positive and negative poles of the intelligent power supply are electrically connected to the positive and negative input terminals of the ammeter through wires respectively. The positive and negative output terminals of the ammeter are fixedly connected to the positive and negative input terminals of the coil through wires. The mounting rack is installed on the iron stand, a coil is fixedly connected to one side of the mounting rack, the electronic balance is arranged directly below the coil, a connecting block is fixedly installed at the top of the electronic balance, and a placing table is sleeved on the connecting block. Magnets are placed on both sides of the top of the placing table.
[0008] Preferably, placing grooves are fixedly installed on both sides of the top of the placing table, and the magnets are placed in the placing grooves.
[0009] Preferably, a scale ring is attached to the top of the electronic balance. The scale ring is sleeved outside the placement table. The overall shape of the placement table is circular, and a pointer is fixedly installed on one side of the placement table.
[0010] Preferably, a U-shaped clamp is fixedly installed on one side of the top of the coil. The U-shaped clamp is clamped on one side of the mounting frame and fixedly connected by bolts.
[0011] Compared with the existing technology, the beneficial effects of the present utility model are as follows: simple operation, obvious experimental phenomena at a glance, obvious proportional relationship of the obtained data, small error, which is beneficial for students to understand the influencing factors of the magnitude of Ampere force, encourages students to think and propose improvement plans, and conduct hands-on practice and independent exploration, which is beneficial for students to complete the construction of physical thinking and the cultivation of core qualities. Moreover, in the experimental process, it is also very easy to control each variable, with strong logic, realizing innovative quantitative experiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is the top view of the structure of the present utility model;
[0013] Figure 2 is the structure of the present utility model Figure 1 the front view of the electronic balance in.
[0014] In the figure: intelligent power supply 1, ammeter 2, iron stand 3, mounting frame 4, electronic balance 5, coil 6, placement table 7, magnet 8, scale ring 9, pointer 10, connecting block 11. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments:
[0016] Such as Figure 1 and Figure 2As shown in the figure, a demonstrator for quantitatively exploring the magnitude of the Ampere force includes an intelligent power supply 1, an ammeter 2, an iron stand 3, a mounting bracket 4, an electronic balance 5, a coil 6, and a magnet 8. The positive and negative poles of the intelligent power supply 1 are electrically connected to the positive and negative input terminals of the ammeter 2 through wires respectively. The positive and negative output terminals of the ammeter 2 are fixedly connected to the positive and negative input terminals of the coil 6 through wires. The mounting bracket 4 is installed on the iron stand 3. One side of the mounting bracket 4 is fixedly connected to the coil 6. The electronic balance 5 is arranged directly below the coil 6. A connecting block 11 is fixedly installed at the top of the electronic balance 5. A placement table 7 is sleeved on the connecting block 11. Magnets 8 are placed on both sides of the top of the placement table 7. The necessary conditions for exploring the magnitude of the Ampere force are set, that is, the current, the magnet 8, the coil 6, and the angle between the magnetic field and the coil, so that the experiment can be successfully completed. The spring dynamometer in the traditional experiment is replaced by the electronic balance 5. In this way, when there is a change, an accurate number will be displayed on the electronic balance 5, thereby increasing the accuracy and intuitiveness of the experiment. At the same time, the operation is more convenient, which is convenient for students to start operating and can arouse their learning interest.
[0017] Placement grooves are fixedly installed on both sides of the top of the placement table 7. The magnets 8 are placed in the placement grooves. Placing the magnets 8 in the placement grooves can conveniently replace the number of magnets 8 in the two placement grooves, so as to conveniently change the magnetic field magnitude.
[0018] A scale ring 9 is attached to the top of the electronic balance 5. The scale ring 9 is sleeved outside the placement table 7. The whole of the placement table 7 is circular. A pointer 10 is fixedly installed on one side of the placement table 7. The settings of the scale ring 9 and the pointer 10 can intuitively display and change the angle between the magnetic field and the coil 6, so as to facilitate the experiment.
[0019] A U-shaped clamp is fixedly installed on one side of the top of the coil 6. The U-shaped clamp is clamped on one side of the mounting bracket 4 and fixedly connected by bolts. The fixation is simple and convenient, the disassembly is easy, and the assembly is simple.
[0020] The specific experimental process is as follows: Change the current to explore the influence on the magnitude of the Ampere force. Keep the number of magnets 8 unchanged. Adjust the voltage adjustment knob on the intelligent power supply 1. By adjusting the voltage magnitude, the current flowing through the coil 6 is changed. Record the readings of the electronic balance 5 at different currents in turn;
[0021] Change the magnetic field 8 to explore the influence on the magnitude of the Ampere force. Hang the coil 6 above the electronic balance 5 through the iron stand 3, so that the lower border of the coil 6 is placed in the uniform magnetic field region between the two magnetic poles of the magnet 8. Turn on the electronic balance 5. At this time, the mass of the magnet 8 will be displayed on the display screen. Zero it. Press the switch to turn on the power supply of the external control circuit. Since the energized coil 6 is affected by the Ampere force, the magnet 8 is subjected to a reaction force from the energized coil 6, so that the pressure on the electronic balance 5 changes. The magnitude of the Ampere force received by the lower border of the coil 6 can be calculated through the reading of the electronic balance 5;
[0022] Change the wire length (that is, the number of turns of the coil) to explore the influence on the magnitude of the Ampere force. By changing the number of turns of the coil 6, the length of the wire connected to the circuit is changed. When changing the length, it is necessary to ensure that the current in the circuit remains unchanged, and observe the relationship between the reading of the electronic balance 5 and the wire length;
[0023] Change the angle to explore the influence on the magnitude of the Ampere force. A self-made placement table 7 is placed above the electronic balance 5, and a pointer 10 is fixed to read the angle value. Rotate the placement table 7 to change the angle between the coil 6 and the magnetic field strength. Record the readings of the electronic balance 5 at different angles respectively. According to theoretical analysis, we predict that the Ampere force may be related to, so directly explore the relationship between the magnitude of the Ampere force and sinɑ.
[0024] After obtaining the data, directly generate an effect diagram through the computer, which is easier for students to understand and deeper for the understanding of the formula F = BILsinɑ.
[0025] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.
Claims
1. A quantitative demonstration instrument for exploring the size of Ampere force, comprising an intelligent power supply (1), an ammeter (2), an iron stand (3), a mounting frame (4), an electronic balance (5), a coil (6) and a magnet (8), characterized in that: The positive and negative electrodes of the intelligent power supply (1) are electrically connected to the positive and negative input terminals of the ammeter (2) through wires, respectively; the positive and negative output terminals of the ammeter (2) are fixedly connected to the positive and negative input terminals of the coil (6) through wires; a mounting frame (4) is installed on the iron frame (3); one side of the mounting frame (4) is fixedly connected to the coil (6); the electronic balance (5) is arranged directly below the coil (6); a connection block (11) is fixedly installed on the top of the electronic balance (5); a placement platform (7) is sleeved on the connection block (11); the connection block (11) is square in shape; magnets (8) are placed on both sides of the top of the placement platform (7).
2. A quantitative exploration of the Ampere force demonstrator according to claim 1, characterized in that: Placement grooves are fixedly installed on both sides of the top of the placement platform (7), and the magnets (8) are placed in the placement grooves.
3. A quantitative exploration of the Ampere force demonstrator according to claim 1, characterized in that: A scale ring (9) is attached to the top of the electronic balance (5), and the scale ring (9) is sleeved outside the placement platform (7). The placement platform (7) is circular in shape as a whole, and a pointer (10) is fixedly installed on one side of the placement platform (7).
4. A quantitative exploration of the Ampere force demonstrator according to claim 1, characterized in that: A U-shaped clip is fixedly mounted on one side of the top end of the coil (6), and the U-shaped clip is clamped on one side of the mounting frame (4) and fixedly connected by bolts.