Taller_corriente-y-resistencia - 5 0 Ω(que se supone...

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Ejercicios de f´ ısica II Semana 6: Corriente el´ ectrica Universidad Nacional de Colombia Una linea de transmisi´ on con un di´ ametro de 2 , 00 cm y una longitud de 200 Km lleva una corriente estable de 1000 A. Si el conductor es un alambre de cobre con una densidad de cargas libres de 8 , 49 × 10 28 electrones/m 3 , ¿cu´ anto tarda el electr´ on en recorrer la linea de transmisi´ on? La bater´ ıa de un autom´ ovil tiene una fem de 12 , 6 V y una resistencia interna de 0 , 080 Ω . Los dos faros juntos representan una resistencia equivalente de
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Unformatted text preview: 5 , 0 Ω (que se supone constante). ¿Cu´ al es la diferencia de potencial aplicada a las bombillas de los faros? Para el circuito que se muestra en la figura, calcule (i) la corriente en el resitor de 2 , 00 Ω y (ii) la diferencia de potencial entre los puntos a y b . Un capacitor en un circuito RC se carga al 60 % de su valor m´ aximo en , 90 s. ¿Cu´ al es la constante de tiempo en el circuito? 1...
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