Measurement of <i>g</i> using a magnetic pendulum and a smartphone magnetometer

Pili, Unofre; Violanda, Renante; Ceniza, Claude

doi:10.1119/1.5028247

Cited by 41 publications

(12 citation statements)

References 8 publications

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“…This was accomplished by calculating the time gap between wave peaks to determine the period. The smartphone's magnetic field sensor proved to be a dependable tool for measuring oscillation periods [26]. After obtaining the period, the data was visually represented, as illustrated in Figure 6.…”

Section: Discussionmentioning

confidence: 99%

The Impact of Teaching Simple Harmonic Motion Supported by A Smartphone-based Sensor on Students’ Conceptual Mastery

Arum,

Suana,

Permadi

2023

J. Phys.: Conf. Ser.

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One of the common challenges encountered when conducting physics experiments is ensuring measurement accuracy. Conversely, the emergence of smartphone-based sensor applications presents an opportunity to address these issues. Thus, this research aimed to assess the effectiveness of Physics Toolbox Sensor Suite (PTSS), a smartphone-based sensor, in enhancing students’ conceptual mastery of simple harmonic motion. The study employed a non-equivalent control group design, with a valid and reliable multiple-choice test as the research instrument. The sample comprised 70 2nd grade students from a public senior high school in Indonesia, with 35 students for each experimental and control group. The research was conducted during the Even Semester of the 2022/2023 Academic Year at a public high school in Lampung Province. Both groups were instructed using the same pedagogical approach-discovery learning. However, the experimental group conducted experiments aided by PTSS, while the control group did not. N-gain analysis revealed a greater increase in conceptual mastery within the experimental class compared to the control class. The average n-gain for the experimental group was 0.74, whereas for the control group, it was only 0.64. Furthermore, the Mann-Whitney test indicated an Asymp. Sig. (2-tailed) value of 0.004, smaller than 0.05, suggesting that smartphone-based sensors like PTSS could facilitate simple harmonic motion experiments and enhance students’ conceptual mastery.

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Section: Discussionmentioning

confidence: 99%

The Impact of Teaching Simple Harmonic Motion Supported by A Smartphone-based Sensor on Students’ Conceptual Mastery

Arum,

Suana,

Permadi

2023

J. Phys.: Conf. Ser.

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“…[2] To measure the period, the simplest way is to use the smartphone stopwatch (#10). Any sensors can be used: video analysis [16] (#11), accelerometer [2,16] (#12), gyroscope [16] (#13), magnetometer [17] (#14, either using a permanent magnet as the weight, or hanging the smartphone itself to the pendulum and measuring the Earth magnetic field), light sensor [18] (#15), proximity sensor (#16), audio record (#17*) using a Bluetooth speaker and looking for the audio modulation due to the distance to the source varying.…”

Section: Methods Using a Giant Pendulummentioning

confidence: 99%

61 ways to measure the height of a building: an introduction to experimental practices

Bouquet,

Organtini,

Kolli

et al. 2020

Preprint

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We imagined and tested 61 methods to measure the height of a building using a smartphone and everyday low-cost equipment. This open question forces students to explore various fields of physics and confront them with experimental questions such as the validity of a model, the notion of uncertainty, and precision. It allows them to compare different experiments, and can be shaped into various pedagogical scenarios, engaging students in a concrete task, outside of the lab, easily set up at almost zero cost.

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“…4 To measure multipoles, we can use the three-axis magnetic field sensor embedded in every smartphone. This sensor, intended for use as a compass and in navigation and GPS, has been used in experiments where magnets have been used as timing sensors in pendula, 5 springs, 6 and rotations. 7 The sensor has been used to explore the magnetic field generated by the Earth in both a laboratory context 8 and in semester-long examinations of the local magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Magnetic Field outside small Accelerator Magnet Analogs via Experiment, Simulation, and Theory

Sullivan¹,

Sen²,

Sullivan³

2021

Preprint

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Multipole expansions of electric charge and current distributions and the fields those multipoles create are a fundamental pillar of electromagnetic theory, but explanations and examples are rare beyond a dipole. In this paper we describe a low-cost exploration of magnetic multipoles. Using the field from ideal magnetic dipoles and a simple binomial approximation, we show that each multipole obeys B ∝ r n , with n = −3, −4, −5, −6 for a dipole, quadrupole, sextupole, and octupole, respectively. Using commercially available NdFeB magnets and the magnetic field sensor inside a smartphone, we experimentally verify the power-law dependence of the multipole configurations. Finally, the open-source Python library Magpylib can simulate the magnetic field of arbitrary permanent magnet distributions, which also shows the same power law dependence for the different multipole configurations.

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Measurement of g using a magnetic pendulum and a smartphone magnetometer

Cited by 41 publications

References 8 publications

The Impact of Teaching Simple Harmonic Motion Supported by A Smartphone-based Sensor on Students’ Conceptual Mastery

The Impact of Teaching Simple Harmonic Motion Supported by A Smartphone-based Sensor on Students’ Conceptual Mastery

61 ways to measure the height of a building: an introduction to experimental practices

Investigating the Magnetic Field outside small Accelerator Magnet Analogs via Experiment, Simulation, and Theory

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