ELECTROMOTIVE FORCE
Hello friends! Today I present another practice carried out in my community service, this time is about the electromotive force (emf).
OBJECTIVE: To study the electromotive force and the application of its laws.
ELECTROMOTIVE FORCE: It is the work or energy that a generator must use to move the load unit through the entire circuit. It is usually written as a emf, whose equation is given by:
where:
ε: Is the electromotive force.
w: The work.
q: the load.
OHM’S LAW FOR COMPLETE CIRCUITS: In a complete circuit, the emf of the generator is directly proportional to the current intensity of the circuit multiplied by the total resistance.
ELECTRIC POWER: Electric power is the work that must be done on a load per unit of time:
where:
P: Is the electric power.
w: The work.
t: The time.
LAW OF JOULE: The quantity of heat released by a metallic conductor when the current circulates through it is directly proportional to:
To the square of the current intensity that circulates.
To the resistance of the conductor.
To the times what it takes the current to pass through the driver.
The experiments applied in this practice were carried out using:
coils.
ammeters.
switches and magnets.
And what we put into practice with the students was to see how the magnitude of the current varied with respect to the coils.
References:
BRETT, E. y SUÀREZ, W. Física Teoría y practica 2do año Ciclo Diversificado. Editorial Discolar S.A. Caracas 1998.
Física, Tomo IV, Decima Quinta Edición. Editorial Grupo Escalera UNIVERSIDAD SIMON BOLIVAR.
Education on Steem, Steem Science by @dojeda