Yerima J. B*, Kamaldeen A, Midala J, and Najoji S. D

• access_time28 December, 2023

  subjectCategory: Physical Sciences

• A digital dual-scale measuring machine was constructed consisting of two identical ring magnets coupled in repulsive configuration and a microcontroller. The two magnets in repulsive mode behaves as an elastic spring obeying Hooke's magnetic law provided the elastic limit of the magnets is not exceeded. The dual-scale machine with upper scale limits of mass 1.2 kg and extension 1.5 cm was used to measure assorted masses of objects and their corresponding extensions. Using the linear relation between mass and extension, the following magnetic quantities were determined: magnetic force constant 8244.3 N/m, push strength of the magnet 44.15 N, pole strength 588.22 Am, magnetic dipole moment 23.53 Am2, magnetization 138762.70 A/m, and remanence 0.1744 T. In addition, the product moment correlation coefficient between the actual mass and measured mass is 0.9926 and the cumulative power consumption of the constructed machine is 4.25 watts.
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