Este experimento se puede mostrar en las clases de ciencias como prueba de los efectos de los campos magnéticos de los alambres atravesados por corrientes eléctricas. Es una variante simplificada de la experiencia originalmente realizada por Ampere.

 

Dos conductores eléctricos paralelos atravesados por la corriente continua crean campos magnéticos alrededor de ellos que interactúan con la aparición de fuerzas de atracción y repulsión. Las fuerzas deben ser atraídas si las corrientes tienen sentidos opuestos de movimiento como se muestra en la figura 1, y repulsión si las corrientes tienen el mismo significado.

 

   Figura 1 - Las fuerzas entre los cables
Figura 1 - Las fuerzas entre los cables | Clique na imagem para ampliar |

 

 

Las fuerzas son dadas por la dirección de las líneas de la fuerza del campo alrededor de los alambres. Si los alambres están sueltos, podemos observar fácilmente las fuerzas por la curvatura que tendrán.

 

En el caso de la atracción, los alambres tienden a acercarse y en el caso de la repulsión tienden a alejarse. Vea que la experiencia requiere corrientes de cierta intensidad lo que significa que debemos utilizar una batería grande o incluso una fuente que tiene control de corriente. La experiencia debe hacerse rápidamente para que Las pilas no están agotadas En poco tiempo.

 

En la figura 2 tenemos el montaje del aparato.

 

   Figura 2 – Montaje
Figura 2 – Montaje | Clique na imagem para ampliar |

 

 

En una base de madera de aproximadamente 1 metro de longitud se fijan 4 clavos donde están prisioneros alambres comunes finos sueltos, pero paralelos. La distancia entre los cables deben ser de la orden 1 a 2 cm, para que el efecto sea fuerte.

 

La llave S1 se utiliza para invertir la dirección de circulación de la corriente de uno de los alambres. Encendiendo el aparato, con la conexión de la batería notarás atracción o repulsión y con la activación de S1 el efecto se invierte.

 

 

Lista de Material

 

B1 – Pila grande

X1 – Llave 2 x 2

X1 – Base de madera – Ver texto

Varios:

Hilo, soldadura, clavos, etc.

 

 

 

 

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