Magnetic experimental instrument with single pendulum

Abstract

The invention discloses a new magnetic experimental instrument with a single pendulum. The new magnetic experimental instrument with the single pendulum proves not only a quantitative relation between period T and pendulum length L but also a quantitative relation between the period T and acceleration g. A coil is used as a substrate of the single pendulum; a u-shaped frame is mounted on the substrate; an electronic stopwatch and a control circuit are mounted on a beam of the u-shaped frame while an electronic scale is mounted below the beam; the lower end of the electronic scale is connected with a pendulum ball by a cycloid; the pendulum ball is suspended in the geometric center of the inner ring of the coil; and a photoelectric door is mounted on an inner ring wall which is as high as the pendulum ball. Stable direct current is introduced into the coil, and stable magnetic property will be produced in the center of the coil; when the gravity counting of the pendulum ball on the electronic scale is greater than that in the case of powering-off, the theoretical period value of the single pendulum in the electrified state can be computed. Error analysis can be performed in comparison with the experimental period data of the single pendulum displayed on the stopwatch. When the strength of the current is adjusted, a can be changed to verify the period formula.

Description

technical field [0001] The invention belongs to a high school physics teaching instrument. Specifically, it is a teaching experiment instrument capable of changing the gravitational acceleration of a simple pendulum. technical background [0002] In the current high school physics textbooks, the period formula of a simple pendulum is as follows. During teaching, students should be told that the period T is not only related to the pendulum length L, but also related to the gravitational acceleration g. However, the current experimental instruments can only prove the quantitative relationship between the period T and the pendulum length L, but cannot prove the quantitative relationship between the period T and the acceleration g. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a novel magnetic single pendulum experiment apparatus, which can not only prove the quantitative relationship between period T and pendulum...

AI Technical Summary

Problems solved by technology

However, the current experimental instruments can only prove the quantitative relationship between the period T and the pendulum length L, but cannot prove the quantitative relationship between the period T and the acceleration g

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