THE MAGNETIC PROPERTIES MEASUREMENT OF COIL FOR GRAVITATIONAL ACCELERATION DETERMINATION

Cherly Salawane (Postgraduate Semarang State University, Kelud Utara III Street, Semarang 50237, Indonesia | Faculty of Teacher Training and Education, Universitas Halmahera, Tobelo 97762, Indonesia)
Supriyadi Supriyadi (Postgraduate Semarang State University, Kelud Utara III Street, Semarang 50237, Indonesia |Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University, Gunungpati Sekaran Campus, Semarang 50229, Indonesia)
Ronaldo Talapessy (Graduate School of Science and Technology, Kumamoto University, Kumamoto, Japan)
Mirtha Yunitha Sari Risakotta (Physics Department, Faculty of Mathematics and Natural Sciences, Pattimura University, Ir. M. Putuhena Street, Unpatti Poka Campus, Ambon 97233, Indonesia)

Spektra: Jurnal Fisika dan Aplikasinya
Vol 5 No 2 (2020): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 5 Issue 2, August 2020

The value of the gravitational acceleration of the earth above the earth’s surface depends on the position of the latitude and longitude of the earth’s surface, in other words, because the shape of the earth’s surface is not round like a ball. The magnitude of gravity is not the same everywhere on the surface of the earth. The purpose of this study is to analyze the value of the earth’s gravitational acceleration in a laboratory using a current balance with a graphical method. Fluctuations in the value of the magnetic field strength (B) and the value of the electric current strength (i) on the current balance cause the value of laboratory gravitational acceleration (glab) to vary in the transfer of electric charge (q) according to coil type. The magnitude of the earth’s gravitational acceleration value obtained in a laboratory with a current balance for each type of coil is as follows: SF-37 glab-nr=9.89 m/s2, SF-38 glab-nr=9.90 m/s2, SF-39 glab-nr=9.76 m/s2, SF-40 glab-nr=9.95 m/s2, SF-41 glab-nr=9.75 m/s2 dan SF-42 glab-nr=9.93 m/s2. The results obtained indicate that the value of the earth’s gravitational acceleration in a laboratory close to the literature value is the value of the glab-nr in the SF-37 coil type of 9.89 m/s2.