Faraday law of electromagnetic induction experiment device and experiment method thereof

Abstract

The invention discloses a Faraday law of electromagnetic induction experiment device and an experiment method thereof; the experiment device comprises a teaching variable-frequency power source, a teaching vibration table, a strong magnet, a square coil, and a teaching oscilloscope; the experiment method comprises the following steps: the teaching variable-frequency power source selects a proper AC voltage and frequency to provide power for the teaching vibration table; the strong magnet fixed on a teaching vibration table shaft vibrates up and down; the magnetic flux [phi] in the square coilmakes periodical changes, wherein [delta][phi] is decided by the strong magnet amplitude, and [delta]t is decided by a strong magnet vibration frequency (f=1 / T); along with vibration amplitude and frequency changes, an induction electromotive force E=n[delta][phi] / [delta]t also changes; the vibration amplitude of the central bright spot in the oscilloscope can be observed, thus determining the induction electromotive force size and direction, and carrying out quantitative analysis via changing the amplitude and frequency. The Faraday law of electromagnetic induction experiment device and method can solve the Faraday law of electromagnetic induction difficulties and doubtful points in physics teaching, thus fully improving the physics teaching effect.

Description

Technical field [0001] The invention relates to a physics teaching experiment device, in particular to an experiment device and an experiment method of Faraday's law of electromagnetic induction. Background technique [0002] In the middle school physics "People's Education Press" elective textbook, the third chapter of electromagnetic induction in Chapter 4, "Faraday's Law of Electromagnetic Induction", describes that the magnetic flux passing through a closed circuit changes, and there is an induced current in the circuit. Since there is induced current in the closed circuit, there must be an electromotive force in the circuit. The electromotive force generated in the electromagnetic induction phenomenon is called induced electromotive force. How is its size defined: With the joint efforts of scientists such as Faraday and Weber, people have concluded that the magnitude of the induced electromotive force in a circuit is proportional to the rate of change of the magnetic flux p...

AI Technical Summary

Problems solved by technology

[0003] Since the birth of this law, there have been no direct experiments in textbooks to prove this seemingly simple and abstract law. It is difficult for students to understand, and there is no relevant equipment in the prior art to demonstrate Faraday's law of electromagnetic induction. It can only be indirectly demonstrated by experiments. Instructions, not to mention quantitative analysis

Images