Ohm's law display device for electronic teaching

Abstract

The invention relates to an electronic teaching display unit, and especially relates to an electronic teaching ohm law display unit. The electronic teaching ohm law display unit can keep a conductor clean and can reduce errors; the electronic teaching ohm law display unit comprises a bearer, legs, batteries, a support table, elastic contact sheets, a slide rail, slide blocks, a first wedge block,a stop bar, a first spring, a slide rod, a slide sleeve and a second spring; the leg is respectively connected on the left and right sides of the bearer bottom; the support table is connected on top of the bearer; a groove is arranged in the front side face of the support table; two batteries are arranged in the groove. A large conductor moves downwards and makes contacts with the elastic contactsheet in the front side, the current passes an ammeter, thus measuring the large conductor resistance; a middle conductor moves downwards and makes contacts with the elastic contact sheet in the middle, the current passes the ammeter, thus measuring the middle conductor resistance.

Description

technical field [0001] The invention relates to a display device for electronic teaching, in particular to a display device for Ohm's law for electronic teaching. Background technique [0002] In the same circuit, the current passing through a certain conductor is proportional to the voltage across the conductor and inversely proportional to the resistance of the conductor. This is Ohm's law. Resistance is a physical quantity, which in physics represents the resistance of the conductor to the current. The size of the conductor is a basic property of the conductor. The resistance value of the conductor is generally related to the temperature, and also related to the length, cross-sectional area, and material of the conductor; when the teacher conducts experiments on the resistance of the conductor and the cross-sectional area of ​​the conductor During the demonstration teaching, the teacher needs to hold the conductors with different cross-sectional areas to carry out experim...

AI Technical Summary

Problems solved by technology

[0002] In the same circuit, the current passing through a certain conductor is proportional to the voltage across the conductor and inversely proportional to the resistance of the conductor. This is Ohm's law. Resistance is a physical quantity, which in physics represents the resistance of the conductor to the current. The size of the conductor is a basic property of the conductor. The resistance value of the conductor is generally related to the temperature, and also related to the length, cross-sectional area, and material of the conductor; when the teacher conducts experiments on the resistance of the conductor and the cross-sectional area of ​​the conductor During the demonstration teaching, the teacher needs to hold the conductors with different cross-sectional areas to carry out experiments and demonstrations for the students, and the human hand has a temperature. When the weather is hot in summer, the temperature of the hand is higher and sweating is easy, so it is easy to get the conductor Dirty, and the temperature of the hands is high. Holding the conductor for the experiment shows that the experimental data will be affected by the temperature. In order to prevent the conductor from being dirty and reduce the error, the teacher will use tweezers to hold the conductor for the experiment, but If you are not careful, the conductor is easy to drop, resulting in damage to the conductor

Images