CN203300105U

CN203300105U - Demonstration device for Ampere force phenomenon

Info

Publication number: CN203300105U
Application number: CN2013201931815U
Authority: CN
Inventors: 张晓英
Original assignee: Huzhou University
Current assignee: Huzhou University
Priority date: 2013-04-03
Filing date: 2013-04-03
Publication date: 2013-11-20
Anticipated expiration: 2023-04-03

Abstract

The utility model discloses a demonstration device for an Ampere force phenomenon. The demonstration device comprises a base (1), fixed terminals (2), a soft wire (3), a horseshoe magnet (4), a connecting wire (5), a switch (6), and power supply terminals (7). The base (1) is mounted with a pair of the fixed terminals (2), the horseshoe magnet (4) are embedded in the base (1), two poles are exposed out of the base (1), the fixed terminals (2) are aligned with one pole in position, and the connecting wire (5) is a length of soft wire and fixed on the two fixed terminals. The demonstration device is connected through the switch (6) and the power supply terminals (7), and can demonstrate the magnitude and the direction of the ampere force applied on an energized conductor in a magnetic field.

Description

A kind of Ampère force phenomenon demonstrator

Technical field

The utility model relates to a kind of physics facility, relates in particular to a kind of Ampère force phenomenon demonstrator.

Background technology

Magnetic field is commonly referred to Ampère force to the acting force of electric current, and this names the outstanding contribution aspect the effect of electrified wire in research magnetic field in order to commemorate French physicist's ampere.Experiment shows, one section electromotion straight wire MN is placed in magnetic field, and when the wire direction is vertical with magnetic direction, the Ampère force maximum that electric current is suffered.

The suffered Ampère force of conductor of energising, the size of power is proportional to size of current, magnetic induction density and conductor length.If conductor length L, the electric current I of passing through, perpendicular to magnetic field, magnetic induction density is B, the size of Ampère force is F=BIL.The direction of Ampère force judges with left-hand rule: stretch out left hand, four fingers point to direction of current, allow the magnetic line of force pass the palm of the hand, and the direction of thumb is exactly the direction of Ampère force.

In physics teaching in secondary school, Ampère force is important content, but the student lacks practical experience, beyond one's depth, some concept is difficult to memory, a kind of Ampère force phenomenon demonstrator of the present utility model, can very simple this phenomenon be demonstrated out, effect is excellent, can either allow the student improve learning interest, grasps the rudimentary knowledge of learning, can also allow the student improve problem analysis, problem-solving ability, device is simple, and is clear, easily operation.

The utility model content

The purpose of this utility model is to provide directly perceived, the effective a kind of Ampère force phenomenon demonstrator of a kind of method.

The purpose of this utility model is achieved through the following technical solutions:

A kind of Ampère force phenomenon demonstrator of the present utility model comprises: base 1, link post 2, flexible circuit conductor 3, horseshoe magnet 4, connection wire 5, switch 6, power-line terminal 7.

A pair of link post 2 horseshoe magnets 4 are installed on described base 1 to be embedded on base 1, expose two magnetic poles on base 1, link post 2 aligns with one of them magnetic pole front and back position, connecting wire 5 is one section flexible circuit conductor, be fixed on two link posts, by switch 6, with power-line terminal 7, be connected.

The a pair of link post 2 of installing on described base 1, its spacing is 50mm approximately, and horseshoe magnet 4 is embedded on base 1, and the height that exposes two magnetic poles is 5mm approximately;

Described connection wire 5 is about 52mm, and is namely slightly longer than two link post distances.

In embodiment of the present utility model, also need 04,006 one of another standby student power source, be output as: direct current 1V-25V/6A, 4A, 2A, 1 of the BX7D series slide rheostat of rated current 8A, in experiment, power supply is connected with power-line terminal 7 by slide rheostat.

Can be found out by the technical scheme that above-mentioned the utility model provides, a kind of Ampère force phenomenon demonstrator, can demonstrate the size and Orientation of electrical conductor is subject in magnetic field Ampère force easily, and experimental technique is easy, directly perceived.

Description of drawings

Fig. 1 is a kind of Ampère force phenomenon demonstrator schematic diagram of the present utility model.

In figure: 1, base, 2, the link post, 3, flexible circuit conductor, 4, horseshoe magnet, 5, connect wire, 6, switch, 7, power-line terminal.

Embodiment

A kind of Ampère force phenomenon demonstrator of the present utility model, its better embodiment as shown in Figure 1.

At first this experimental provision each several part is connected by diagram, flexible circuit conductor 3 is placed in the middle of two magnetic poles of horseshoe magnet 4.

The 6A shelves are transferred in the output of direct supply, select the DC current of a direction to flexible circuit conductor 3 input 6A, close a switch 6 in a flash, flexible circuit conductor 3 can jump to outside two magnetic poles of horseshoe magnet 4 immediately, the direction of the Ampère force that flexible circuit conductor 3 is suffered meets left-hand rule: stretch out left hand, four fingers point to direction of current, allow the magnetic line of force pass the palm of the hand, the direction of thumb is exactly the direction of Ampère force, so flexible circuit conductor 3 jumps to direction shown in Figure 1.

Change flexible circuit conductor 3 by sense of current, close a switch after 6, within flexible circuit conductor 3 can jump to again two magnetic poles of horseshoe magnet 4 immediately, the suffered Ampère force of flexible circuit conductor 3 this moment was according to left-hand rule, and its direction must be with aforementioned opposite.

If constantly change the sense of current by flexible circuit conductor 3, flexible circuit conductor 3 will be constantly in the inside and outside jump of two magnetic poles of horseshoe magnet 4, as " rope skipping ", very excellent.

Ampère force can make the phenomenon of flexible circuit conductor " rope skipping ", makes the student be subject to the effect of power to electrical conductor in magnetic field and, to being subjected to the determination methods of force direction, understands deeply, and memory firmly.

The above; it is only the better embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement, within all should being encompassed in protection domain of the present utility model.

Claims

1. an Ampère force phenomenon demonstrator, is characterized in that: comprising: base (1), link post (2), flexible circuit conductor (3), horseshoe magnet (4), connection wire (5), switch (6), power-line terminal (7);

Upper a pair of link post (2) horseshoe magnet (4) of installing of described base (1) is embedded on base (1), expose two magnetic poles on base (1), link post (2) aligns with one of them magnetic pole front and back position, connecting wire (5) is one section flexible circuit conductor, be fixed on two link posts, by switch (6), with power-line terminal (7), be connected.