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Motional electromotive force tester

A technology of electromotive force and measuring instrument, which is applied in the direction of instruments, educational appliances, teaching models, etc., can solve problems such as difficulty in measuring moving electromotive force, difficulty in obtaining a uniform magnetic field, and large range of conductor translation

Inactive Publication Date: 2018-10-23
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this instrument is that it is difficult to obtain a uniform magnetic field in a large range due to the relatively large range of conductor translation, making it difficult to popularize the measurement of motional electromotive force in the laboratory

Method used

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  • Motional electromotive force tester
  • Motional electromotive force tester
  • Motional electromotive force tester

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0030] Below in conjunction with accompanying drawing, the patent of the present invention is described further.

[0031] The dynamic electromotive force measuring instrument in the attached drawing is mainly composed of a hard plastic frame 8, a hard plastic material with a graduated support rod 11 on the frame, a Helmholtz coil composed of two circular coils 3 and 6, and an aluminum rod with a copper ball at one end. 5. It is composed of a micro-motor 1 powered by a dry battery, a DC power supply 9, a voltmeter 10, a fixing screw 12 and a hard plastic tray 13.

[0032] In order to avoid electromagnetic induction, the material of the hard plastic stand, the hard plastic stand with scales, the fixing screws and the hard plastic tray must be plastic.

[0033] The circular coil 3 and the circular coil 6 together form a Helmholtz coil (the wire 7 is wound on both sides of the circular coil uniformly and equally). The Helmholtz coil is fixed on the hard plastic stand through a ha...

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PUM

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Abstract

A motional electromotive force tester is a physical experimental instrument used for quantitatively measuring a motional electromotive force generated by rotating a conductor at a uniform speed in a uniform magnetic field. A Helmholtz coil, a conductor and a miniature motor are fixed to the upholder of a plastic material. The conductor is placed in the uniform magnetic field near the middle pointof a Helmholtz coil axis. The conductor is driven by the miniature motor to rotate at a constant speed in a plane vertical to the axis of the Helmholtz coil. A voltmeter is used to measure that the voltage of the two ends of the conductor is the motional electromotive force generated when the conductor rotates. The miniature motor and the Helmholtz coil use a safe voltage, and the motional electromotive force generated in the conductor is in a safe range.

Description

Technical field: [0001] The invention patent is a physical experimental instrument for quantitatively measuring the kinetic electromotive force generated by a conductor rotating at a uniform speed in a magnetic field. Background technique: [0002] At present, only the measuring instrument for measuring the motional electromotive force generated by the translation of the conductor in the uniform magnetic field has been developed. [1] . The problem with this instrument is that it is difficult to obtain a uniform magnetic field in a large range due to the relatively large translational range of the conductor, making it difficult to popularize the measurement of the motional electromotive force in the laboratory. [0003] [1]. Tong Peixiong, Zhao Zaizhong, Rao Shuangmei, Pan Zhengyuan. The Measurement of Motional Electromotive Force [C] Proceedings of the Sixth Conference on Physics Experiment Teaching in Colleges and Universities (Part 2), Shanghai: 2004. Invention content:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/18
CPCG09B23/187
Inventor 李启成
Owner LIAONING TECHNICAL UNIVERSITY
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