In this practice was observed and practiced law ohm, where he studied the basic units present in any electrical circuit as a voltage or voltage,current strength and endurance. In which by means of a small circuit in series and in parallel could be measured above units.
Ohm's law relates the value of the resistance of a conductor with theintensity of current through and the potential difference between its ends. In the graph we see a circuit with a resistor and a battery. We observed an ammeter that will measure the current, I. Thevoltage provided by the battery V, expressed in volts, the current intensity, measured in amperes, and the value of the resistance in ohms, are related by Ohm's law, which appears in the center of thecircuit.
The objective of these experiences is to verify the relation between the fall of potential and the intensity of the current in a resistance; and the relation between the electricalresistance of a conductor and its geometry. For it we armed a circuit with a source of variable tension and measured the voltage drop and the intensity of the current. Soon we measured the resistance ofconductors of different length and section to find a relation between these parameters section to find a relation between these parameters.
(FIGURA 1. Ley de ohm).
Connection in series
* El objetivo que se pretende conseguir con la realización de estapráctica es poner en evidencia la relación que hay entre la tensión aplicada a un conductor y la intensidad de la corriente que circula por él. Tomando los correspondientes datos y mediante la utilización deuna gráfica determinaremos la resistencia y luego comprobaremos si los datos teóricos se corresponden con la realidad. La experiencia se realizará con cinco resistencias diferentes.