CN110599877B - Demonstration device for several basic contents of charged body - Google Patents
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- CN110599877B CN110599877B CN201910976873.9A CN201910976873A CN110599877B CN 110599877 B CN110599877 B CN 110599877B CN 201910976873 A CN201910976873 A CN 201910976873A CN 110599877 B CN110599877 B CN 110599877B
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Abstract
The demonstration device of several basic contents of electrified body, this device mainly comprises DC power supply, high voltage DC power supply electrode brush, motor, conductor clean shot, transparent insulating box, magnetic conduction silicon steel cone, aluminium foil column casing, transparent insulating plastic column casing, aluminium foil and little magnetism needle, characterized by: a hard insulating rod is fixed on a rotating shaft of the motor, the insulating rod is fixed with the conductor hollow ball, and an axis extension line of the rotating shaft of the motor passes through the spherical center of the conductor hollow ball; the motor, the direct current power supply and the high-voltage direct current power supply are all fixed at the bottom of the transparent insulating box, the direct current power supply switch K1 has the functions of adjusting the rotating speed and turning the switch, the magnetic silicon steel cone is a cone formed by magnetic conduction silicon steel sheets, the contents such as electrostatic induction of an electrified body and the magnetic effect of a current can be demonstrated, the manufacturing is simple and easy, the effect is obvious, and more education functions can be added in the teaching.
Description
Technical Field
The patent relates to a demonstration device and a demonstration method for exploring several basic contents of an electrified body, and belongs to the field of physical experiments.
Background
In college physics teaching, the magnetic effects and the application of electrostatic induction, electrostatic shielding and stable and constant current are important contents and teaching difficulties, students usually have difficulty in understanding the phenomena of electrostatic induction and shielding, and the existing demonstration contents are single, such as the knowledge of the electric field of a charged spherical surface and the action of the charged spherical surface on a conductor is still limited in the electrostatic range; the experiment phenomenon that the magnetic field of the steady current is limited to the conduction current, while the magnetic effect of the transport current is in conceptual memory and is difficult to understand and appreciate, when the magnetic field is applied, students take the exercise formula and are difficult to solve the practical problems, the students often ask for the movement of charges and only have the acting force (electrostatic field) of electrostatic charges? Only the magnetic field (effect)? Or both effects are present? How to understand the effects of an electrostatic field, a steady magnetic field and a charged conductor after movement, lack of corresponding experimental device demonstration and exploration, and how teachers consider, design and research to solve the relevant problems in order to cultivate the innovative spirit and practical ability of students, the patent aims to solve the problems. The method is completed under the support of national natural fund projects (project numbers are 11805107 and 11405092), basic business cost scientific research projects (project number is 135209251) of high schools belonging to provinces of Heilongjiang province and high schools and application projects (project number is SJGY 20170385).
Reference documents:
experiment and analysis of electrostatic jump ball of interesting paraffin flame scale block in Captain of Liang, Chaojia, and Physics of university in 2015, No. 4
Disclosure of Invention
The patent is a demonstration for solving the problems related to the contents of several basic electrostatic and magnetic effects of a charged body, and focuses on the technology and method for researching and solving the problems by combining a charged sphere, a magnetic conduction silicon steel cone, a motor, an aluminum foil column barrel and the like.
This patent technical scheme: the demonstration device of several basic contents of electrified body mainly includes DC power supply, high voltage DC power supply electrode brush, motor, conductor clean shot, transparent insulating box, magnetic conduction silicon steel cone, aluminium foil column casing, transparent insulating plastic column casing, aluminium foil, little magnetism needle constitute, characterized by: a hard insulating rod is fixed on a rotating shaft of the motor, the insulating rod is fixed with the conductor hollow ball (the rotating shaft of the motor is insulated from the conductor hollow ball), and the axis extension line of the rotating shaft of the motor passes through the spherical center of the conductor hollow ball; the straight rod for the motor is fixed at the bottom of the transparent insulating box, the direct-current power supply and the high-voltage direct-current power supply are both fixed at the bottom of the transparent insulating box, the direct-current power supply switch K1 has the functions of adjusting the rotating speed and a steering switch (can also be designed and manufactured by self, if the steering is carried out, the input electrode of the motor is exchanged, and the sliding rheostat changes the rotating speed of the motor), the high-voltage direct-current power supply switch K2 has the function of adjusting the voltage switch, and the direct-current power supply switch K1 and the high-voltage direct-current power supply switch K2 are both fixed at the outer side of the side wall of the transparent insulating box (an insulating lead penetrates through a hole punched in the side wall; the hollow conductor balls are made of non-ferromagnetic material, an aluminum foil column casing (made of aluminum film for barbecue in the market) is sleeved outside the transparent insulating plastic column casing, and the inner diameter of the aluminum foil column casing is slightly larger than the outer diameter of the transparent insulating plastic column casing; the transparent insulating box is a rectangular box made of resin plate materials, and an upper cover of the box can be opened and closed; a straight rod (insulation) is fixed at the upper opening of a transparent insulation plastic column barrel, two ends of two strings (insulation materials) are respectively fixed on the straight rod and an aluminum foil (round), the aluminum foil is vertically hung below the straight rod, the central axis of the aluminum foil is overlapped with the central axis of a motor, a plastic graduated scale (convenient for observing the moving position of the aluminum foil) is arranged below the aluminum foil, a hole is formed in the plastic graduated scale, and the aperture of the plastic graduated scale is matched with the outer diameter of a support rod of a small magnetic needle (a through hole in the middle of the small magnetic needle is in smooth contact with the support rod); one end of an insulating coated wire is connected with an electrode of a high-voltage direct-current power supply, the edge coated wire is internally provided with an elastic thin copper wire, the insulating coated wire is fixed on an insulating straight rod, the insulating straight rod is fixed on the high-voltage direct-current power supply, the other end of the insulating coated wire is exposed out of a bundle of elastic thin copper wires to serve as (form) a high-voltage direct-current power supply electrode brush, the high-voltage direct-current power supply electrode brush is in contact with (just in contact with) a conductor hollow ball, a magnetic conductive silicon steel cone is formed by laminating silicon steel sheets with good magnetic conductivity, the tip of the cone is processed into a spherical surface (the, the bottom surface edge of the cone is chamfered (the radius is 2.5mm, and the point discharge is avoided), the bottom surface of the magnetic silicon steel cone faces the conductor hollow ball, and the central shaft of the magnetic silicon steel cone is superposed with the axis of the motor; the transparent insulating box, the transparent insulating plastic column barrel and the magnetic conduction silicon steel cone are all fixed on the horizontal desktop (the positions of the transparent insulating box, the transparent insulating plastic column barrel and the magnetic conduction silicon steel cone are adjustable); a magnetometer is placed in the transparent insulating plastic column barrel to be matched with the transparent insulating plastic column barrel to measure the magnetic field intensity, namely, the magnetometer is introduced to measure the magnetic field in the transparent insulating plastic column barrel in the experiment related to the electrostatic rotation (the rotation of a motor) of the conductor hollow ball.
The following can be demonstrated:
a) removing the magnetic silicon steel cone, turning off a direct current power switch K1, switching on a high-voltage direct current power switch K2, charging the conductor hollow ball, adding a certain voltage (without discharging), stopping boosting, and in the process, observing that the aluminum foil moves to the conductor hollow ball by an angle La, wherein the moving distance is La and forms an angle with the vertical direction, and at the moment, sleeving the aluminum foil on the transparent insulating plastic column, and restoring the aluminum foil to the vertical state (initial state, shielding); b) the magnetic silicon steel cone is placed in the original position (at a fixed position between the transparent insulating plastic column and the transparent insulating box), the experimental process is repeated, the experimental phenomenon is compared with the experimental phenomenon a), the shielding phenomenon and the non-shielding phenomenon can be seen, the magnetic silicon steel cone can also be seen to play a role in collecting an electric field, the displacement of the aluminum foil towards the hollow sphere of the conductor is increased (increased by forming an angle with the vertical direction) to be Lb when the aluminum foil is not shielded, and the Lb is larger than La;
c) removing the magnetic silicon steel cone, turning off a direct current power switch K1, switching on a high-voltage direct current power switch K2, charging the conductor hollow ball, adding a certain voltage (without discharging), stopping boosting, and in the process, seeing that the moving distance of the aluminum foil to the conductor hollow ball is Lc, at the moment, sleeving the aluminum foil on the transparent insulating plastic column barrel, and restoring the aluminum foil to a vertical state (an initial state and shielding); d) the magnetic silicon steel cone is placed in situ, the process is repeated, and the experimental phenomenon of c) is compared, so that the magnetic silicon steel cone can play a role of converging an electric field besides the shielding phenomenon and the non-shielding phenomenon, and the movement displacement of the aluminum foil to the hollow sphere of the conductor is increased (increased by forming an angle with the vertical direction) to be Ld when the shielding is not carried out, wherein Ld is more than Lc (compared with the experiment 1, Lb is more than Ld);
e) after the conductor hollow ball is charged and a certain voltage (without discharging) is added, the voltage boosting is stopped, the direct-current power switch K1 is switched on, the motor drives the conductor hollow ball to rotate, the direct-current power switch K1 controls the rotating speed of the motor to be unchanged, the operation process of the experiment 2 is repeated, and the change, the increase, the invariance or the reduction of the movement displacement of the thin strong magnetic sheet to the conductor hollow ball caused by the rotation of the motor (the rotation direction of the motor is changed, the direction of a magnetic field generated by the conductor hollow ball is changed, and the direction of the acting force of the strong magnetic sheet is changed) are; f) the influence of the magnetic silicon steel cone placed in situ and moved out on the position of the thin strong magnetic sheet is explored, and the magnetic silicon steel cone with the magnetic convergence magnetic field function is obtained;
g) after the conductor hollow ball is charged and a certain voltage is added (no discharge), the boosting is stopped, and the position of the aluminum foil is observed (displacement Lge); the direct-current power switch K1 is switched on, the motor drives the conductor hollow ball to rotate, the direct-current power switch K1 controls the rotating speed of the motor to be unchanged, the operation process of the experiment 2 is repeated, and the position (displacement Lgm) of the aluminum foil is observed; comparing the magnitude of displacement Lge with that of displacement Lgm (this is a very novel and highly creative experimental project, which can be a research topic in senior level);
after the experiment is finished, the high-voltage direct-current power switch K2 is switched off, and the conductor hollow sphere is grounded to discharge (or is connected with the other electrode to discharge).
Do not add the magnetic conduction silicon steel cone at the initial stage of the experiment, the experimental phenomenon is obvious inadequately (atress object displacement is little), for improving electric field strength from the theoretical consideration of adding the magnetic conduction silicon steel cone in experimental apparatus, can strengthen the convergence of electric field by electrostatic induction, the magnetic conduction silicon steel cone can strengthen the convergence effect in magnetic field again, the demonstration effect of experiment is obvious, can see electrostatic shielding and non-shielding phenomenon, can demonstrate the magnetic effect phenomenon of rotatory electric charge again, and whether the electric charge that people pay close attention to changes with the effort to non-ferromagnetic conductor when rotatory? How it changes. The hollow conducting ball may be replaced with charged plate for research.
The special point of the patent is that different from the existing experiment, the understanding and the understanding of the electrification system to the electrostatic induction, the electrostatic shielding, the convergence of the electrostatic field and the magnetic effect of the convection current are realized by the positive and negative rotation of the electrification ball body and the introduction of the magnetic conduction silicon steel cone through the electrification ball body, the aluminum foil column barrel, the magnetic sheet and the like, and the significance of the understanding of the electromagnetic effect of the electrification body is important for students. The manufacturing is extremely simple and easy, the effect is obvious, and more education functions can be added when the teaching aid is popularized in teaching.
Drawings
FIG. 1 is a schematic diagram of the principle structure of the patent
Wherein: 1. the high-voltage direct-current power supply comprises a direct-current power supply, 2, a high-voltage direct-current power supply, 2-1, a high-voltage direct-current power supply electrode brush, 3, a motor, 4, a conductor hollow sphere, 5, a transparent insulating box, 6, a magnetic conductive silicon steel cone, 7, an aluminum foil column barrel, 8, a transparent insulating plastic column barrel, 9, an aluminum foil sheet and 10, a small magnetic needle.
Detailed Description
As shown in the attached figure 1: the demonstration device of several basic contents of the electrified body mainly comprises a direct current power supply 1, a high voltage direct current power supply 2, a high voltage direct current power supply electrode brush 2-1, a motor 3, a conductor hollow sphere 4, a transparent insulation box 5, a magnetic conduction silicon steel cone 6, an aluminum foil column casing 7, a transparent insulation plastic column casing 8, an aluminum foil 9 and a small magnetic needle 10, and is characterized in that: a hard insulating rod is fixed on a rotating shaft of the motor 3, the insulating rod is fixed with the conductor hollow ball 4 (the rotating shaft of the motor is insulated from the conductor hollow ball), and an axial extension line of the rotating shaft of the motor 3 passes through the spherical center of the conductor hollow ball 4; the motor 3 is fixed at the bottom of the transparent insulating box 5 by a straight rod, the direct-current power supply 1 and the high-voltage direct-current power supply 2 are both fixed at the bottom of the transparent insulating box 5, a switch K1 of the direct-current power supply 1 has the functions of adjusting the rotating speed and turning a switch (can also be designed and manufactured by self, if turning, the input electrode of the motor is exchanged, and a sliding rheostat changes the rotating speed of the motor), a switch K2 of the high-voltage direct-current power supply 2 has the function of adjusting a voltage switch, and the switch K1 of the direct-current power supply 1 and the switch K2 of the high-voltage direct-current power supply 2 are both fixed at the outer side of the side wall of the transparent insulating box 5 (an insulating lead passes through a hole; the hollow conductor balls 4 are made of non-ferromagnetic material (aluminum), the aluminum foil column 7 (made of aluminum film for barbecue on the market) is sleeved outside the transparent insulating plastic column 8, and the inner diameter of the aluminum foil column 7 is slightly larger than the outer diameter of the transparent insulating plastic column 8; the transparent insulating box 5 is a rectangular box made of resin plate materials, and an upper cover of the box can be opened and closed; a straight rod (insulation) is fixed at the upper opening of a transparent insulation plastic column barrel 8, two ends of two strings (insulation materials) are respectively fixed on the straight rod and an aluminum foil 9 (round), the aluminum foil 9 is vertically hung below the straight rod, the central shaft of the aluminum foil 9 is overlapped with the central shaft of a motor 3, a plastic graduated scale (convenient for observing the moving position of the aluminum foil 9) is arranged below the aluminum foil 9, a hole is formed in the plastic graduated scale, and the size of the hole is matched with the outer diameter of a support rod of a small magnetic needle 10 (a through hole in the middle of the small magnetic needle is in smooth contact with the support rod); one end of an insulating coated wire is connected with an electrode of a high-voltage direct-current power supply 2, the insulating coated wire is composed of an elastic thin copper wire in a marginal coated wire, the insulating coated wire is fixed on an insulating straight rod, the insulating straight rod is fixed on the high-voltage direct-current power supply 2, the other end of the insulating coated wire is exposed out of a bundle of elastic thin copper wire to serve as (form) a high-voltage direct-current power supply electrode brush 2-1, the high-voltage direct-current power supply electrode brush 2-1 is in contact with (just in contact with) a conductor hollow ball 4, a magnetic silicon steel cone 6 is formed by laminating magnetic silicon steel sheets with good magnetic conductivity, the tip of the cone is processed into, the bottom surface edge of the cone is chamfered (the radius is 2.5mm, and the point discharge is avoided), the bottom surface of the magnetic conduction silicon steel cone 6 faces the conductor hollow ball 4, and the central shaft of the magnetic conduction silicon steel cone 6 is superposed with the axis of the motor 3; the transparent insulation box 5, the transparent insulation plastic column 8 and the magnetic conduction silicon steel cone 6 are all fixed on the horizontal desktop (the positions are adjustable); a magnetometer is arranged in the transparent insulating plastic column barrel 8 to measure the magnetic field intensity; that is, in the experiment involving the electrostatic rotation (rotation of the motor 3) of the hollow conductor sphere 4, a magnetometer was introduced to measure the magnetic field in the transparent insulating plastic cylinder.
The following can be demonstrated:
a) removing the magnetic silicon steel cone 6, turning off a switch K1 of a direct current power supply 1, switching on a switch K2 of a high voltage direct current power supply 2, charging the conductor hollow sphere 4, adding a certain voltage (without discharging), stopping boosting, and in the process, seeing that the aluminum foil 9 moves towards the conductor hollow sphere 4, wherein the moving distance is La and forms an angle with the vertical direction, at the moment, sleeving the aluminum foil column cylinder 7 on the transparent insulating plastic column cylinder 8, and restoring the aluminum foil 9 to the vertical state (initial state, shielding); b) the magnetic conduction silicon steel cone 6 is placed in situ (at a fixed position between the transparent insulation plastic column 8 and the transparent insulation box 5), the experimental process is repeated, the experimental phenomenon is compared with the experimental phenomenon a), the shielding phenomenon and the non-shielding phenomenon can be seen, the magnetic conduction silicon steel cone 6 can also be seen to play a role in converging an electric field, and the displacement of the aluminum foil 9 moving towards the conductor hollow ball 4 is increased (increased by forming an angle with the vertical direction) to be Lb when no shielding exists, wherein Lb is larger than La;
c) removing the magnetic silicon steel cone 6, turning off a switch K1 of a direct current power supply 1, switching on a switch K2 of a high voltage direct current power supply 2, charging the conductor hollow sphere 4, adding a certain voltage (without discharging), stopping boosting, and in the process, seeing that the distance of the aluminum foil 9 moving to the conductor hollow sphere 4 is Lc, at the moment, sleeving the aluminum foil column tube 7 on the transparent insulating plastic column tube 8, and enabling the aluminum foil 9 to be restored to a vertical state (an initial state and shielded); d) the magnetic silicon steel cone 6 is placed in situ, the process is repeated, and the experimental phenomenon of c) is compared, so that the shielding phenomenon and the non-shielding phenomenon can be seen, the magnetic silicon steel cone 6 can also be seen to play a role of converging an electric field, the movement displacement of the aluminum foil 9 to the hollow sphere 4 is increased (increased by forming an angle with the vertical direction) to be Ld when the shielding is not carried out, and Ld is larger than Lc (compared with the experiment 1, Lb is larger than Ld);
e) after the conductor hollow ball 4 is charged and a certain voltage (without discharging) is added, the voltage boosting is stopped, the direct-current power supply 1 switch K1 is switched on, the motor 3 drives the conductor hollow ball 4 to rotate, the direct-current power supply 1 switch K1 controls the rotating speed of the motor to be unchanged, the operation process of the experiment 2 is repeated, a magnetometer is introduced to measure the magnetic field in the transparent insulating plastic column, the change of the movement displacement of the thin strong magnetic sheet to the conductor hollow ball 4 caused by the rotation of the motor 3 to the thin strong magnetic sheet is explored, the increase, the invariability or the reduction of the movement displacement is realized, the steering of the motor 3 is changed, the direction of the magnetic field generated by the conductor hollow ball 4 is changed; f) the influence of the magnetic silicon steel cone 6 on the position of the thin strong magnetic sheet when the magnetic silicon steel cone 6 is placed in situ and moved out is researched, and the magnetic silicon steel cone 6 with the magnetic convergence magnetic field function is obtained;
g) after the conductor hollow spheres 4 are charged and a certain voltage is added (no discharge), the boosting is stopped, and the position of the aluminum foil 9 is observed (displacement Lge); switching on a switch K1 of the direct-current power supply 1, driving the hollow conductor ball 4 to rotate by the motor 3, controlling the rotating speed of the motor to be unchanged by the switch K1 of the direct-current power supply 1, repeating the operation process of the experiment 2, introducing a magnetometer to measure the magnetic field in the transparent insulating plastic column casing, and observing the position (displacement Lgm) of the aluminum foil 9; comparing the magnitudes of the displacement Lge and the displacement Lgm (guiding the analysis of students, which is a very novel and highly creative experimental project and can be used as a research subject of senior level);
after the experiment is finished, the switch K2 of the high-voltage direct-current power supply 2 is disconnected, and the conductor hollow sphere 4 is grounded to discharge (or connected with the other electrode to discharge).
Claims (1)
1. The demonstration device of several basic contents of electrified body mainly comprises DC power supply (1), high voltage DC power supply (2), high voltage DC power supply electrode brush (2-1), motor (3), conductor hollow ball (4), transparent insulation case (5), magnetic conduction silicon steel cone (6), aluminium foil column casing (7), transparent insulation plastic column casing (8), aluminium foil (9) and little magnetic needle (10), characterized by: a hard insulating rod is fixed on a rotating shaft of the motor (3), the insulating rod is fixed with the conductor hollow ball (4), and an axial extension line of the rotating shaft of the motor (3) passes through the spherical center of the conductor hollow ball (4); the motor (3) is fixed at the bottom of the transparent insulating box (5) by a straight rod, the direct-current power supply (1) and the high-voltage direct-current power supply (2) are both fixed at the bottom of the transparent insulating box (5), a switch K1 of the direct-current power supply (1) has the functions of rotating speed adjustment and steering switch, a switch K2 of the high-voltage direct-current power supply (2) has the function of voltage adjustment switch, a switch K1 of the direct-current power supply (1) and a switch K2 of the high-voltage direct-current power supply (2) are both fixed at the outer side of the side wall of the transparent insulating box (5), an insulated wire penetrates through a hole punched in; the conductor hollow balls (4) are made of non-ferromagnetic materials, the aluminum foil column casing (7) is sleeved outside the transparent insulating plastic column casing (8), and the inner diameter of the aluminum foil column casing (7) is slightly larger than the outer diameter of the transparent insulating plastic column casing (8); the transparent insulating box (5) is a cuboid box made of resin plate materials, and an upper cover of the box can be opened and closed; a straight rod is fixed at the upper opening of a transparent insulating plastic column barrel (8), two ends of two strings are respectively fixed on the straight rod and an aluminum foil (9), the aluminum foil (9) is vertically hung below the straight rod, the central axis of the aluminum foil (9) is superposed with the central axis of a motor (3), a plastic graduated scale is arranged below the aluminum foil (9), holes are formed in the plastic graduated scale, and the aperture of the plastic graduated scale is matched with the outer diameter of a support rod of a small magnetic needle (10); one end of an insulating coated wire is connected to an electrode of a high-voltage direct-current power supply (2), the insulating coated wire is internally composed of an elastic thin copper wire, the insulating coated wire is fixed on an insulating straight rod, the insulating straight rod is fixed on the high-voltage direct-current power supply (2), the other end of the insulating coated wire is exposed to form a bundle of elastic thin copper wire serving as a high-voltage direct-current power supply electrode brush (2-1), the high-voltage direct-current power supply electrode brush (2-1) is in contact with a conductor hollow ball (4), a magnetic-conductive silicon steel cone (6) is a cone composed of magnetic-conductive silicon steel sheets, the top of the cone is processed into a spherical surface, the edge of the bottom of the cone is chamfered, the bottom of the magnetic-conductive silicon steel cone (6) faces; the transparent insulating box (5), the transparent insulating plastic column (8) and the magnetic conduction silicon steel cone (6) are all fixed on the horizontal desktop; a magnetometer is arranged in the transparent insulating plastic column casing (8) to measure the magnetic field intensity in a matching way;
several basic contents of charged bodies demonstrate:
experiment 1, demonstrating the electrostatic shielding and non-shielding phenomena under the condition of existence or non-existence of the magnetic-conductive silicon steel cone (6), moving out the aluminum foil column tube (7), keeping the distance between the transparent insulating plastic column tube (8) and the transparent insulating box (5) unchanged,
a) removing the magnetic silicon steel cone (6), turning off a switch K1 of a direct current power supply (1), switching on a switch K2 of a high-voltage direct current power supply (2), charging the conductor hollow sphere (4) and adding a certain voltage, and stopping boosting, wherein in the process, the aluminum foil (9) can move towards the conductor hollow sphere (4) with a moving distance of La and an angle with the vertical direction, at the moment, the aluminum foil column cylinder (7) is sleeved on the transparent insulating plastic column cylinder (8), and the aluminum foil (9) is restored to the vertical state; b) the magnetic conduction silicon steel cone (6) is placed in the original position, the experimental process is repeated to compare with the experimental phenomenon of a), the shielding phenomenon and the non-shielding phenomenon can be seen, the magnetic conduction silicon steel cone (6) can also be seen to play a role of converging an electric field, and the movement displacement of the aluminum foil (9) to the hollow sphere (4) of the conductor is increased to be Lb when no shielding exists, wherein Lb is larger than La;
experiment 2, demonstrating that a thin strong magnetic sheet is adhered on the surface of an aluminum foil (9), the phenomena of electrostatic shielding and non-shielding are observed, the distance between a transparent insulating plastic column tube (8) and a transparent insulating box (5) is kept unchanged,
c) removing the magnetic silicon steel cone (6), turning off a switch K1 of a direct current power supply (1), switching on a switch K2 of a high-voltage direct current power supply (2), charging the conductor hollow sphere (4) to a certain voltage, and stopping boosting, wherein the moving distance of the aluminum foil (9) to the conductor hollow sphere (4) is Lc, at the moment, the aluminum foil column casing (7) is sleeved on the transparent insulating plastic column casing (8), and the aluminum foil (9) is restored to a vertical state; d) the magnetic conduction silicon steel cone (6) is placed in the original position, the process is repeated, the experimental phenomenon is compared with the experimental phenomenon of c), the shielding phenomenon and the non-shielding phenomenon can be seen, the magnetic conduction silicon steel cone (6) can also be seen to play a role of converging an electric field, and the movement displacement of the aluminum foil (9) to the hollow sphere (4) of the conductor is increased to Ld when the shielding is not carried out, wherein Ld is larger than Lc;
experiment 3, demonstrating the position of removing the aluminum foil (9), replacing the aluminum foil (9) with a thin strong magnetic sheet, and exploring the law under the action of the transport current charge: keeping the distance between the transparent insulating plastic column (8) and the transparent insulating box (5) unchanged, placing the magnetic conductive silicon steel cone (6) in situ,
e) after the conductor hollow ball (4) is charged and a certain voltage is added, the voltage boosting is stopped, the switch K1 of the direct current power supply (1) is switched on, the conductor hollow ball (4) is driven to rotate by the motor (3), the rotating speed of the motor (3) is controlled to be unchanged by the switch K1 of the direct current power supply (1), a magnetometer is introduced to measure the magnetic field intensity in the transparent insulating plastic column, and the change of the movement displacement of the thin strong magnetic sheet to the conductor hollow ball (4) caused by the rotation of the conductor hollow ball (4) driven by the motor (3) is explored, so that the change is increased, unchanged or reduced; f) the magnetic conduction silicon steel cone (6) is explored to be placed in the original position and moved out to influence the position of the thin strong magnetic sheet, and the magnetic conduction silicon steel cone (6) is obtained to have the magnetic conduction convergence magnetic field effect.
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