CN201048006Y

CN201048006Y - Experiment device of electric field line delineation

Info

Publication number: CN201048006Y
Application number: CNU2007201113182U
Authority: CN
Inventors: 赵绍兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-02
Filing date: 2007-07-02
Publication date: 2008-04-16
Anticipated expiration: 2017-07-02

Abstract

The utility model relates to a physical experimental device for drawing electric field lines. The device comprises an electrostatic machine with a discharge deadman and an electricity test feather connected with the electrostatic machine through a wire. The part at the upper end of a metallic rod of the electricity test feather consists of more than three metallic plates, and the external surface of the part at the upper end of the metallic rod is of a sphere shape. Insulated wires are attached and had best be clamped between the metallic plates of the electricity test feather so as to be three-dimensionally distributed and had better take a shape of a hemisphere. The insulated wires on the electricity test feather had best not contact with each other. Because the technical proposal is adopted, the demonstration of the space distribution condition of the electric field lines and the demonstration of the space distribution condition of the electric field lines of two equivalent homologous and heterogeneous point charges can be better realized, and the experimental effect is driven to be very intuitive, specific and lively, thereby motivating the learning interest of students.

Description

The experimental provision that a kind of electric field line is described

Technical field

The utility model relates to the experimental provision that a kind of electric field line on the physics is described, be specifically related to be 2003 the 1st edition, the 7th printing April in 2005, pass through through the examination in 2002 of national middle school teaching material validation board, by People's Education Publishing House's physical cell write, people education publishing house, second on full-time common senior middle school textbook " required adding takes as an elective course ".A kind of analog demenstration of the experimental provision (homepage that makes reference to the text-book illustration 4) of " electric field line " joint (textbook 124-125 page or leaf) in the 30 chapter " electric field ".

Background technology

Experiment shown in the figure of institute's layout in the teaching material because electric plume has only the silk thread of individual layer, when the analog electrical field wire, lacks a kind of stereoscopic sensation, easily mislead students.

The utility model content

Problem to be solved in the utility model is: utilizes electric plume, realizes that preferably electric field line makes experiment effect very directly perceived in the spatial distribution state demonstration, and concrete, lively, motivate students' interest in learning.

Problem to be solved in the utility model is achieved in that and comprises the induction machine that has the fork arm that discharges, with induction machine by lead link to each other electric plume, the part of the Metallic rod upper end of electric plume is made up of three above sheet metals, and its outside surface is dome shape; Insulated wire is attached to, and preferably is clipped in to form space multistory between the sheet metal of electric plume and distribute, and its shape also is best with the semisphere; It is better that insulated wire on the electric plume does not contact effect mutually.

Owing to adopted technique scheme, just can realize preferably that electric field line demonstrates at spatial distribution state, and two equivalent is of the same race, the electric field line spatial distribution states demonstration of xenogenesis point charge, makes experiment effect very directly perceived, specifically, vividly, thus motivate students' interest in learning.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing:

The experimental provision that Fig. 1 describes for a kind of electric field line of the utility model;

Among the figure: 1, insulating base, 2, Metallic rod, 3, tightening gong nail, 4, sheet metal,

5, insulated wire, 6, lead, 7, the discharge fork arm, 8, induction machine

Embodiment

In Fig. 1, check the electric plume preparation earlier, insulated wire 5 is clamped between the sheet metal 4, will be the upper end of the Metallic rod 2 of sheet metal 4 tightenings on insulating base 1 of hemispheric clamping insulated wire 5 again with tightening gong nail 3; Then, utilize the induction machines 8 of existing energy generation several ten thousand volt voltages in the general middle school to electrify, the positive and negative charge of induction machine 8 generations is at this moment assembled on two attached discharge fork arms 7 of induction machine 8 respectively, the plus or minus electric charge of assembling on the discharge fork arm 7 makes electric plume charged by lead 6 Metallic rod 2 of flowing through; The electric charge that induction machine 8 produces reaches electric plume continually by this path, in air, have only seldom a part of electric charge to be taken away by air, like this, constantly replenish down at induction machine 8, make electric plume with the quantity of electric charge and a utmost point of induction machine reach dynamic electrostatic equilibrium, because the sheet metal 4 of electric plume, what insulated wire 5 was with is with a kind of electric charge, under the effect of the mutual repulsive force of like charges, 5 roots of insulated wire on the lighter sheet metal 4 are erected, direction according to line of electric force distributes automatically, thereby more concrete, the lively electric field line distribution of " having described ".

For the effect that makes experiment is more obvious, and finish this experiment with alap electrizer voltage, should be noted that: 1, insulation hanger 5 preferably can not contact with each other; 2, be clipped in insulation hanger 5 between the sheet metal 4, be preferably insulation paper slip or line.

In addition; need to prove; for technician under the industry; the experimental provision that a kind of electric field line of the present utility model is described can also have many equivalences to change; as the different materials of the hanger that insulate is selected; thickness, length and the variation of density degree each other, the different materials of electrical verification accessory pinna, shape, structure choice or the like, these equivalent variations all should belong among the protection domain of the experimental provision that a kind of electric field line of the present utility model describes.

Claims

1. experimental provision that electric field line is described, comprise the induction machine that has the fork arm that discharges, with induction machine by lead link to each other electric plume, it is characterized in that: the part of the Metallic rod upper end of described electric plume is made up of three above sheet metals, and the outside surface that these sheet metals form is dome shape; Insulated wire is attached between the described sheet metal of electric plume, is space multistory and distributes.

2. the experimental provision that a kind of electric field line according to claim 1 is described is characterized in that: described insulating clamp forms space multistory and distributes between the described sheet metal of electric plume.

3. the experimental provision that a kind of electric field line according to claim 1 and 2 is described is characterized in that: the outside surface of the part of the Metallic rod upper end of described electric plume is a semisphere.

4. the experimental provision that a kind of electric field line according to claim 3 is described is characterized in that: the insulated wire on the described electric plume is for discontiguous mutually.