Maglev for students

Kraftmakher, Yaakov

doi:10.1088/0143-0807/29/4/001

Cited by 6 publications

(5 citation statements)

References 22 publications

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“…Instead, modern and cheap neodymium magnets comfortably generate high intensity effects. In fact, permanent magnets are the base of many revealing and spectacular demonstrations, including magnetic levitation [3], magnetic braking [4,5], diamagnetic levitation [6] and many others.…”

Section: Introductionmentioning

confidence: 99%

Forces between permanent magnets: experiments and model

González

2016

Eur. J. Phys.

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This work describes a very simple, low-cost experimental setup designed for measuring the force between permanent magnets. The experiment consists of placing one of the magnets on a balance, attaching the other magnet to a vertical height gauge, aligning carefully both magnets and measuring the load on the balance as a function of the gauge reading. A theoretical model is proposed to compute the force, assuming uniform magnetisation and based on laws and techniques accessible to undergraduate students. A comparison between the model and the experimental results is made, and good agreement is found at all distances investigated. In particular, it is also found that the force behaves as r−4 at large distances, as expected.

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Section: Introductionmentioning

confidence: 99%

Forces between permanent magnets: experiments and model

González

2016

Eur. J. Phys.

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“…The model is carefully analysed in a 2D context at low speed, and the experimental results are explained on the basis of a finite-element calculation. This task could be considered as a good proposal for university courses for postgraduates in physics and engineering [16].…”

Section: Discussionmentioning

confidence: 99%

Laboratory scale prototype of a low-speed electrodynamic levitation system based on a Halbach magnet array

Íñiguez

Raposo

2009

Eur. J. Phys.

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In this paper we analyse the behaviour of a small-scale model of a magnetic levitation system based on the Inductrack concept. Drag and lift forces acting on our prototype, moving above a continuous copper track, are studied analytically following a simple low-speed approach. The experimental results are in good agreement with the theoretical calculations. 3D-numerical simulations are also used to highlight the significance of the edge effects and to extrapolate the results to higher speeds.

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“…Although the experiment described above concerns non-contacting forces [2] and the set-up may appear similar to those of other experiments in having magnetic levitation [3][4][5][6], our objectives were different and more diverse. Moreover, this set-up can be used to semi-quantitatively elaborate on the second law.…”

Section: Activitymentioning

confidence: 99%

A magnetic set-up to help teach Newton’s laws

et al. 2009

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A set-up comprising a magnetic disc, a solenoid and a mechanical balance was used to teach first-year physics students Newton's third law with the help of a free body diagram. The image of a floating magnet immobilized by the solenoid's repulsive force should help dispel a common misconception of students as regards the first law: that stationary objects are not being acted on by any force at all. Dropping the magnet onto the electrified solenoid, which can change polarity, can lead to more sophisticated elaboration of the second law.

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Maglev for students

Cited by 6 publications

References 22 publications

Forces between permanent magnets: experiments and model

Forces between permanent magnets: experiments and model

Laboratory scale prototype of a low-speed electrodynamic levitation system based on a Halbach magnet array

A magnetic set-up to help teach Newton’s laws

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