A conceptual map about alternating current circuits

Teachers are deeply concerned on how to be more effective in our task of teaching. We must organize the contents of our specific area providing them with a logical configuration, for which we must know the mental structure of the students that we have in the classroom. We must shape this mental structure, in a progressive manner, so that they can assimilate the contents that we are trying to transfer, to make the learning as meaningful as possible. In the generative learning model, the links before the stimulus delivered by the teacher and the information stored in the mind of the learner requires an important effort by the student, who should build new conceptual meanings. That effort, which is extremely necessary for a good learning, sometimes is the missing ingredient so that the teaching-learning process can be properly assimilated. In electrical circuits, which we know are perfectly controlled and described by Ohm's law and Kirchhoff's two rules, there are two concepts that correspond to the following physical quantities: voltage and electrical resistance. These two concepts are integrated and linked when the concept of current is presented. This concept is not subordinated to the previous ones, it has the same degree of inclusiveness and gives rise to substantial relations between the three concepts, materializing it into a law: The Ohm, which allows us to relate and to calculate any of the three physical magnitudes, two of them known. The alternate current, in which both the voltage and the current are reversed dozens of times per second, plays an important role in many aspects of our modern life, because it is universally used. Its main feature is that its maximum voltage is easily modifiable through the use of transformers, which greatly facilitates its transfer with very few losses. In this paper, we present a conceptual map so that it is used as a new tool to analyze in a logical manner the underlying structure in the alternate current circuits, with the objective of providing the students from Sciences and Engineering majors with another option to try, amongst all, to achieve a significant learning of this important part of physics.

30 a��os de la Autonom��a de Castilla-La Mancha: ��ordenaci��n territorial o pentaprovincia?

Tras 30 a��os del Estado de las Autonom��as nos parece oportuno estudiar el origen y desarrollo de Castilla-La Mancha, uno de los territorios pluriprovinciales con mayores problemas de ordenaci��n integral, haciendo una breve referencia al pasado, a Castilla la Nueva. De la actual Comunidad Aut��noma de Castilla-La Mancha nos ha interesado analizar el desarrollo territorial en sus distintas escalas, as�� como la pol��tica de ordenaci��n territorial del conjunto regional, se��alando la aportaci��n llevada a cabo desde la Geograf��a.

Dos lecturas de la vida de Mar��a: la Vita Christi de Isabel de Villena y la Vida de la sacrat��ssima verge Maria de Miquel Peres

La Vita Christi de Isabel de Villena y La vida de la sacrat��ssima verge Maria de Miquel Peres son dos obras devocionales surgidas en la Valencia de finales del siglo XV, y caracterizadas ambas por su tem��tica mariana. Sin embargo, nunca se han analizado conjuntamente para ver posibles dependencias o divergencias. Este trabajo expondr�� por primera vez c��mo, pese a la proximidad tem��tica, cada autor ofrece un texto diferente para abordar el protagonismo de la Virgen en los hechos evang��licos.

Pike National Forest (N.F.) / San Isabel National Forest (N.F.) / Comanche National Grasslands / Cimarron National Grasslands (CO,KS) : environmental impact statement.

Mode of access: Internet.

Causa ce��lebre formada a Ro��mulo Vign��ale, por uxoricidio a Mari��a Isabel Garci��a.

Cover title.

Teor��a de las Cortes �� grandes juntas nacionales de los reinos de Leon y Castilla. Monumentos de su constitucion pol��tica y de la soberan��a del pueblo. Con algunas observaciones sobre la lei fundamental de la monarqu��a espa��ola ... de 1812.

Mode of access: Internet.

The story of Isabel Bevier.

Mode of access: Internet.

Trag��dia de la insigne reina do��a Isabel.

"Ap��ndices: I. A bibliot��ca. II. O monet��rio. III. O testamento": p. [119]-167.

Historia de los reyes cato��licos D. Fernando y Don��a Isabel /

Vol. 1 contains a list of the members; v. 2 a list of the publications of the society.

Actas de las Cortes de Castilla.

Sessions in Madrid, except 1570 in Lordoba and 1602 �� 1604 in Valladolid.