Analysis demonstration instrument for Lenz law and Faraday law of electromagnetic induction

A technology of electromagnetic induction and Lenz's law, applied in the direction of instruments, educational tools, teaching models, etc., can solve the problems of poor demonstration of devices and accurate quantitative exploration and analysis

Inactive Publication Date: 2017-11-17
CHINA WEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the existing Faraday's law of electromagnetic induction that cannot demonstrate well and accurately quantitatively explore and analyze, and can only perform qualitative or semi-quantitative

Method used

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  • Analysis demonstration instrument for Lenz law and Faraday law of electromagnetic induction
  • Analysis demonstration instrument for Lenz law and Faraday law of electromagnetic induction
  • Analysis demonstration instrument for Lenz law and Faraday law of electromagnetic induction

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Embodiment Construction

[0015] Such as figure 1 As shown, the instrument has a base plate 5 on which a horizontal plexiglass tube 10 is installed, an electromagnetic induction coil 12 with a tap is placed outside the middle position of the horizontal plexiglass tube 10, and an internal device is placed inside the horizontal plexiglass tube. There is a magnet box 14 with magnets, the magnet box can slide freely in the plexiglass tube, and the magnet box can be replaced to change the size of the magnetic induction B during the experiment. A DC speed-regulating motor 13 is installed on the base plate behind the horizontal plexiglass tube, and two annular baffles up and down are installed on the motor shaft to ensure that the traction rope of the magnet box does not slip out when moving on the motor shaft. Two supports 6 are installed symmetrically at the two ends of the base plate, and four fixed pulleys 9 are installed in the rear of the support 6, and the magnet box traction rope 11 is wound with the ...

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PUM

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Abstract

The invention discloses an analysis demonstration instrument for Lenz law and Faraday law of electromagnetic induction. The analysis demonstration instrument comprises a bottom plate (5). A horizontal organic glass tube (10) is installed on the bottom plate. An electromagnetic induction coil (12) with a plurality of taps is fixed outside the tube. A circular magnet box (14) capable of freely sliding is arranged in the tube. Cylindrical magnets of different models are arranged in the box. A direct-current speed regulation motor (13) is arranged on the bottom plate and is placed on the rear side of the organic glass tube. A traction rope (11) is wound onto a motor shaft by one circle and then is connected with the magnet box through four fixed pulleys. One path of the electromagnetic induction coil (12) with the plurality of taps is connected with a measurement binding post, and the other path of the electromagnetic induction coil (12) with the plurality of taps is connected with a set of light emitting diodes which are connected in the anti-parallel manner. A voltage sensor is connected with the plurality of taps of the measurement binding post, and the voltage sensor is connected with a data processing device. According to the analysis demonstration instrument, the Lenz law and the Faraday law of electromagnetic induction can be demonstrated vividly and reliably, and students can easily understand the above laws.

Description

technical field [0001] The invention generally relates to a physical experiment device, in particular to an experimental device for quantitatively exploring and demonstrating Lenz's law and Faraday's law of electromagnetic induction. Background technique [0002] Electricity is a very important part of middle school physics, and Lenz's law and Faraday's law of electromagnetic induction are two very important laws of electricity in the part of middle school physics and electricity. The content of Lenz's law is: the induced current in a closed loop The direction always makes the magnetic field excited by it hinder the change of the magnetic flux that causes the induced current; the content of Faraday's electromagnetic induction is: when the magnetic flux of the loop changes, the magnitude of the induced electromotive force in the loop is proportional to the rate of change of the magnetic flux passing through the loop Proportional, that is, e=ΔΦ / Δt, if it is a multi-turn coil, ...

Claims

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Application Information

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IPC IPC(8): G09B23/18
CPCG09B23/181
Inventor 代伟罗洁黄军兰小刚
Owner CHINA WEST NORMAL UNIVERSITY
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