Teaching demonstrator capable of measuring positive and negative conductivities

Abstract

A teaching demonstrator capable of measuring positive and negative conductivities belongs to the field of demonstration of teaching apparatuses. The demonstrator is composed of a switching stage, a negative electricity identification stage, a negative electricity amplifying stage, a negative electricity display amplifying stage, a negative electricity cursor and voice indication stage, a positive electricity identification stage, a positive electricity amplifying stage, a positive electricity display amplifying stage, a positive electricity cursor and voice indication stage, an oscillation stage and a display stage; the switching stage comprises a changeover switch, a test rod interface and a testboard; when a measured object is connected to the switching stage, the negative electricity identification stage and the positive electricity identification stage identify positive and negative charges, after amplification, the cursor and voice indication stages are started according to the weakness of the charges, the display amplifying stages start the corresponding display stages, and the magnitude of energy is reflected accurately via the display stages and the cursor and voice indication stages. A multi-display effect is realized, teenagers can known the conductivity condition and understand concepts and meanings of conductors, resistors and insulators, and the demonstrator can be popularized widely in schools.

Description

technical field [0001] The utility model belongs to the field of teaching instrument demonstration. Background technique [0002] Innovation is the soul of a nation, and young students are the power of innovation. [0003] The strength of a country lies in its talents, and the cultivation of talents lies in education. The focus of education on young people is that the country is strong when young people are strong, and the country progresses when young people progress. To cultivate young people's love for science, improving the quality of teaching is the key, and the accuracy of experimental instruments is an important factor in improving teaching. The experiments are more convincing, so that students can understand things, understand natural phenomena, inspire students' thinking, and play an important role in improving the level of education. Therefore, various experimental instruments in teaching are constantly improving, but there are still many deficiencies: First, the...

AI Technical Summary

Problems solved by technology

Therefore, the various experimental instruments in teaching are constantly improving, but there are still many shortcomings: First, the types of experimental instruments are insufficient, especially the experimental instruments for low-grade students are not comprehensive

Second, the spirit of entertaining and teaching in teaching instruments is not enough. Third, the cost of most teaching instruments is too high. Therefore, for some remote village schools, many common teaching instruments cannot be popularized.

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