Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal Journal of Experimental and Applied Physics
Mona Sari
Department of Physics, Universitas Negeri Padang
Control & Systems Engineering Electrical & Electronics Engineering Materials Science & Nanotechnology Physics

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Design of a Gravity Acceleration Measurement System Using a Pendulum Oscillation Tool and Tracker Analysis Annisa Permata; Asrizal Asrizal; Harman Amir; Mona Sari
Journal of Experimental and Applied Physics Vol 4 No 1 (2026): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v4i1.162

Abstract

Experiment has a crucial role in physics, one of the fundamental science for research and technology. This research focuses on gravitation and utilizes methods of experimental design and execution. Measuring gravitation is a frequently studied topic and related to the oscillation pendulum's harmonic. In practice, pendulum oscillations are often still calculated manually without visualizing the pendulum's trajectory during oscillation. With modern learning tools development, harmonic oscillations' measurements can be calculated and analysed by using video tracking software, for example, by generating graphs. A static pendulum with a string in three lengths: 50 cm, 60 cm, and 70 cm is required. The swinging pendulum loaded with a 100-gram weight and filmed by a camera. The recordings were analysed using the tracker software. The results were displayed as a sinusoidal waveform plotted from the points along the pendulum's path during oscillation.
Portable Impedance Spectrometer for Characterizing the Electrical Properties of Dielectric Materials Using A Goertzel Filter M Zikri Arifin; Mairizwan Mairizwan; Asrizal Asrizal; Mona Sari
Journal of Experimental and Applied Physics Vol 4 No 1 (2026): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v4i1.166

Abstract

Dielectric materials have the ability to store large amounts of electrical energy, which is useful in electronics, such as in the manufacture of capacitors. However, the equipment available for characterization is usually quite complex and expensive. Therefore, this study aims to develop a highly portable embedded impedance spectrometer for characterizing the electrical properties of dielectric materials, namely complex permittivity and dissipation factor, and then demonstrate the effect of increasing the test frequency on the measurement results. The system consists of an STM32F407 microcontroller, an AD9850 DDS as an AC signal generator, and a Goertzel filter algorithm for signal processing. The results of testing the system with paper dielectric samples showed an accuracy of 89.37% for real impedance and 93.22% for imaginary impedance. The results of the paper dielectric sample characterization show an increase in the real value of complex permittivity in the 1kHz-10kHz frequency range, while the imaginary value shows an increase from 1kHz-5kHz and then stabilizes up to 10kHz. The increase in frequency also shows an increase in the dissipation factor (dielectric loss) at each increase in frequency
Co-Authors Annisa Permata Asrizal Asrizal Harman Amir M Zikri Arifin Mairizwan Mairizwan