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Exam (elaborations)

Examen Final - electromagnetismo

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Ejercicios para el examen final del curso de electromagnetismo.

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Parcial A


1. Tres partículas cargadas están colocadas sobre el eje x. La partícula 1 tiene una carga de -
5 nC y se encuentra en la posición (-0,5; 0) m. La partícula 2 tiene una carga de 6 nC y está
situada en (0; 0). Mientras que la tercera partícula tiene una carga de 4 nC y está posicionada
en (0,8; 0) m.
- Determine el campo eléctrico resultante en el punto (2; 0) m.

E = 27,7 N/C
E = 31,3 N/C
E = 26,5 N/C
E = 25,7 N/C
E = 30,5 N/C



2. Una barra dieléctrica de 6 cm de longitud tiene una densidad lineal de cargas de 8 nC/m.
Un punto P está situado encima de la barra, justamente sobre su centro y a una distancia de
12 cm.
-Determine el potencial eléctrico en el punto P.

V = 33,6 V
V = 26,7 V
V = 28,9 V
V = 20 V
V = 35,6 V



3. Una varilla de plástico delgada de longitud 15 cm y carga total uniformemente distribuida
de 40 µC está situada sobre el eje x, de forma tal que su inicio coincide con el centro de
coordenadas.
- A partir de la expresión del potencial eléctrico, determine la componente Ex del campo
eléctrico producido por la varilla en el punto (-5; 0) cm.

Ex = 62,9x106 N/C
Ex = 56,2x106 N/C
Ex = 58,3x106 N/C
Ex = 71,9x106 N/C
Ex = 80,9x106 N/C

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