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Sulhadi Sulhadi
Universitas Negeri Semarang, Semarang
Biochemistry, Genetics & Molecular Biology Chemistry Education Mathematics Physics

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Journal : variabel

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Profil Kemampuan Berpikir Kritis Mahasiswa Teknik Elektro pada Tugas Project-Based Learning Pompa Air Tanah Tanpa Listrik Nuri Nuri; Muhammad Atiq; Ellen Proborini; Alrina Alrina; Doni Stiawan; Sulhadi Sulhadi
Variabel Vol 6, No 2 (2023): OCTOBER 2023
Publisher : STKIP Singkawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26737/var.v6i2.4885

Abstract

Tujuan penelitian ini guna mengetahui profil kemampuan berpikir kritis mahasiswa yang dicerminkan dalam perancangan tugas proyek dan penyusunan laporan secara tertulis dengan desain Pre eksperimental desain (xo). Pendekatan yang digunakan dalam penelitian ini adalah penugasan Project-Based Learning (PjBL) yang mengolaborasikan mahasiswa antar mata kuliah prodi teknik elektro STT Pati. Sebagai objek penelitian adalah mahasiwa teknik elektro semester 1 melalui teknik penugasan kolaborasi mahasiswa dalam bentuk rancang bangun pompa air tanpa listrik yang mengolaborasikan antara mata kuliah fisika dasar yang diajarkan pada mahaiswa semester 1 dan mata kuliah energi terbarukan yang diajarkan pada mahasiswa semester 6 Prodi Teknik Elektro STT Pati. Instrumen pengambilan data menggunakan dokumentasi laporan proyek dan hasil produk sederhana. Hasil penelitian ini didapatkan produk pompa air tanpa listrik yang mampu diterapkan pada program pengabdian masyarakat. Susunan laporan proyek alat pompa dikomunikasikan secara tertulis. Hasil akhir penelitian ini adalah berupa deskripsi profil kemampuan berpikir kritis mahasiswa teknik elektro semester 1.Kata Kunci: Berpikir Kritis; PjBL; Pompa Air Tanpa Listrik; Energi TerbarukanProfile of Critical Thinking Ability of Electrical Engineering Students on Project-Based Learning Task Groundwater Pump Without ElectricityABSTRACTThe purpose of this study was to determine the profile of students' critical thinking skills which was reflected in the design of project assignments and the preparation of written reports with Pre experimental design (xo). The approach used in this research was the assignment of Project-Based Learning (PjBL) which collaborates students between electrical engineering study program courses STT Pati. The object of research was electrical engineering students in semester 1 through student collaboration assignment techniques in the form of designing water pumps without electricity that collaborate between basic physics courses taught to semester 1 students and renewable energy courses taught to semester 6 students of the Electrical Engineering Study Program, STT Pati. Data capture instruments used documentation, project reports, and simple product results. The results of the study were obtained from the water pump products without electricity that can be applied to community service programs. The composition of the pump project report was communicated in writing. The final result of this study was in the form of a description of the profile of critical thinking skills of electrical engineering students in semester 1.
A Simple Photovoltaic Experiment for Measuring Planck’s Constant Using Colour Lasers Nuri Nuri; Putut Marwoto; Sunyoto Eko Nugroho; Agus Yulianto; Bambang Subali; Sulhadi Sulhadi; Sumarli Sumarli
Variabel Vol 8, No 2 (2025): OCTOBER 2025
Publisher : STKIP Singkawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26737/var.v8i2.8664

Abstract

The photovoltaic experiment provided a simple, affordable method to determine Planck’s constant through empirical learning. This experiment allowed students to present concrete data using easily available, low-cost materials. The experiment utilised a photovoltaic method, employing a simple, self-designed setup that used three laser pointers with wavelengths of 650nm (red), 535nm (green), and 405nm (blue) as independent variables. A 6V, 1W mini solar cell was used as the target, while the speed of light and electron charge were treated as control variables. The laser pointers were powered by a 3V battery. The data were analysed by plotting the relationship between 1/λ (inverse wavelength) and the measured voltage as the dependent variable. A linear regression analysis was performed to obtain the gradient, which was used to calculate Planck’s constant. The experiment yielded a calculated Planck’s constant of 7.09×10-35Js, with a deviation of 5.69 x 10-34Js, resulting in a relative error of 8.89%. This relative error could be attributed to several factors, including refraction effects caused by the glass layer and adhesive used to protect the semiconductor plate of the solar cell, as well as discrepancies between the actual wavelengths of the laser beams and the labelled wavelengths on the laser pointers.
Co-Authors Agus Yulianto Alrina Alrina Bambang Subali Doni Stiawan Ellen Proborini Muhammad Atiq Nuri Nuri Nuri Nuri Putut Marwoto Sumarli Sumarli Sunyoto Eko Nugroho