Demonstration method for multiple basic contents of charged body

Abstract

The invention discloses a demonstration method for multiple basic contents of a charged body. The method mainly involves a direct current power supply, a high voltage direct current power supply, a high voltage direct current power supply electrode brush, a motor, a conductor hollow ball, a transparent insulating box, a magnetic conductive silicon steel cone, an aluminum foil column cylinder, a transparent insulating plastic column cylinder, an aluminum foil sheet and a small magnetic needle, and is characterized in that a rotating shaft of the motor is fixed to a hard insulating rod; the insulating rod is fixed to the conductor hollow ball; an axis extension line of the rotating shaft of the motor passes through the center of the conductor hollow ball; the motor, the direct current powersupply and the high voltage direct current power supply are all fixed at the bottom of the transparent insulating box; a direct current power supply switch K1 has a speed and direction adjustable switch function; and the magnetic silicon steel cone is a cone composed of magnetic conductive silicon steel sheets. The contents such as the electrostatic induction of the charged body, the magnetic effect of a convection current and the like can be demonstrated; manufacturing is simple and the effect is obvious; and more education functions are added during application to teaching.

Description

technical field [0001] This patent relates to a demonstration device and method for exploring several basic contents of charged bodies, which belongs to the field of physical experiments. Background technique [0002] In college physics teaching, electrostatic induction, electrostatic shielding, and the magnetic effect and application of steady current are important contents and teaching difficulties. Students usually have difficulty in understanding electrostatic induction and shielding phenomena. The existing demonstration content is single, such as the charged spherical surface. The understanding of the electric field and the effect of the charged spherical surface on the conductor is still limited to the electrostatic range; the magnetic field of the steady current is limited to the experimental phenomenon of the conduction current, and the magnetic effect of the current is in the conceptual memory, which is difficult to understand and experience. Application Sometimes s...

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Problems solved by technology

[0002] In college physics teaching, electrostatic induction, electrostatic shielding, and the magnetic effect and application of steady current are important contents and teaching difficulties. Students usually have difficulty in understanding electrostatic induction and shielding phenomena. The existing demonstration content is single, such as the charged spherical surface. The understanding of the electric field and the effect of the charged spherical surface on the conductor is still limited to the electrostatic range; the magnetic field of the steady current is limited to the experimental phenomenon of the conduction current, and the magnetic effect of the current is in the conceptual memory, which is difficult to understand and experience. Application Sometimes students copy the formulas, and it is difficult to solve practical problems. Students often ask that the charge is moving, and there is only the force of static charges (electrostatic field)? Only magnetic field (action)? Or do both functions exist at the same time? How to understand and experience the effects of electrostatic field, stable magnetic field and charged conductor movement, lack of corresponding experimental device demonstration and exploration, in order to cultivate students' innovative spirit and practical ability, how teachers consider, design, research and solve this related problem, this book Patents will solve this problem

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