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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:12 |
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Conference: Bucharest University Faculty of Physics 2012 Meeting
Section: Educational Physics
Title:
Interactive Calculation Sheets as Expert Assistant for Ohm`S Law Study
Authors:
T. FERENER-VARI(1), H.V. TOMA(1), I. OPRESCU(1), Daniela STOICA(2), I. GRIGORE(3)
Affiliation:
(1)"Mihai Viteazul" National College, Ploiesti, Romania
(2)"Ion Luca Caragiale" National College, Ploiesti, Romania
(3)"Lazar Edeleanu" National College, Ploiesti, Romania
E-mail
tonio_fv07@yahoo.com
Horia_TOMA_CD@yahoo.com
oprescu65@yahoo.com
prof_dana_stoica@yahoo.com
grigore_nl@yahoo.com
Keywords:
Ohm law data acquisition analyzing
Abstract:
The same computerized tools and algorithms for data analyzing can be used in real and also in virtual data acquisition. Therefore the student can replace - on the first sheet - data generated by code with data obtained in the real experiment. Our software, for the study of Ohm` s Law, shows that the computer can be an assistant, which helps the students to obtain non-destructive values of the electric currents, which pass through the elements of the real circuit. The student can work with our calculation sheets before and after the real experiment. Before the experiment the students should work with the virtual circuit that is similar to the real circuit on which the student is going to work in order to rediscover or verify Ohm` s Low. That circuit is made of two loops. The first loop contains a source of electromotive force having an internal resistance and a potentiometer, as voltage divider. The second loop contains a part of the potentiometer. That part is connected, by the slide contact of the potentiometer, in parallel with two resistors connected in series. Being a variable voltage source the first loop is a variable cause for the variable effect: the electric current from the second loop. On such a way the student can study the changing in the resistance between all nodes and pairs of points, the changing in the intensity of the currents, which pass through all the elements, and the changing in the electric tension between all nodes and pairs of points. The lines of cells, which are not on the first sheet, shows all the details of the the algorithm of the solution of the didactic exercise which can be created by using the electric circuit. The student can learn physics and programming by using those cells.
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