A control variable type electrostatic shielding demonstration method based on transparent electrolyte

Abstract

A control variable type electrostatic shielding demonstration method based on transparent electrolyte belongs to the field of physical teaching experiment. The method adopts coaxial transparent insulation inner and outer cylinders to form an annular gap containing transparent electrolyte. The medium adjusting unit composed of a micro water pump, a pipeline and a stop valve is used to continuously and quantitatively adjust the liquid level to dynamically control the electrostatic shielding degree. A light conductor ball and a pair of conductor plates are arranged in the inner cylinder to form a high-sensitivity electric field detection unit. By defining the objective timing endpoint criterion of "inability to complete contact", the average swing frequency is used as the response parameter to realize the semi-quantitative indication of the shielding effect. The method also includes the reset operation of grounding discharge of the electrode plate and the conductor plate using the reset tube and the discharge rod after each observation to ensure the consistency of the initial conditions. The method uses transparent ion conductor as the shielding medium, breaks through the cognitive limitation that only metal can be shielded, and is suitable for control variable type inquiry teaching demonstration of electrostatic shielding principle.

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