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PRÁCTICA No. 3
POTENCIAL Y DIFERENCIA DE POTENCIAL
Introducción
Presentare los conceptos de energía potencial y diferencia de potencial, los cuales nos ayudan a resolver problemas que involucran al campo eléctrico.
Si colocamos una carga, q, en un punto cualquiera de una región donde exista campo eléctrico E(x, y, z), dicha carga experimentara una fuerza eléctrica F= qE, y en consecuencia será acelerada para que dicha carga permanezca en equilibrio debemos aplicar una fuerza igual y de sentido contrario
-qE.
Si queremos desplazar la carga en contra de la fuerza ejercida por el campo, desde un punto A hasta un punto B, con velocidad constante o bien cuasiestaticamente, el trabajo realizado por el agente externo se puede calcular con:
A la expresión anterior se le conoce como potencial eléctrico y lo representamos como Ua , de forma similar el diferencial de potencial eléctrico se representa y se obtiene de la siguiente forma.
UAB=UB-UA
O
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Enviado por: Ren Idioma: castellanoPaís: México