Pontifícia Universidade Católica de São Paulo Junior Scientific Initiation PUC/SP and the development of experimental activities in Physics using the Classmate PC
Fig. 19: Screen of the software Audacity showing the measure of the signal obtained with the luminescent light bulb.
2.6 - Students should write down their observations and explain the differences between the light bulbs fed by electricity and fed by battery. The question that should be made with the students: when we observe the light emitted by light bulbs connected to electricity, incandescent and luminescent and others connected to a battery (in flashlights), did we notice a difference in brightness, besides the intensity difference? How is it possible then to explain the differences obtained through the experiment? 2 º class 1 - This class is reserved for the students to come up with hypotheses to explain the curves found. Why does electricity produce a different curve type from the curve of the battery? 1.1 - the teacher should access the site http://phet.colorado.edu/sims/circuit-constructionkit/circuit-construction-kit-ac_pt.jnlp and make the simulations represented in the illustrations below: