24.14 24.14 En el circuito circuito de la figura figura 24.22 24.22 C1= 3.00 μF, C 2= 5.00 μF y C 3= 6.00 μF. El potencial aplicado es Vab = +24.0 V. Calcule a) la carga de cada capacitor; c) la diferencia de potencial entre los puntos a y d. C1 C2 a d b C3
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24.15 En la figura 24.23, cada capacitor tiene C = 4.00 μF y V ab = +28.0 V. Calcule a) la carga de cada capacitor; b) la diferencia de potencial entre los bornes de cada capacitor; c) la diferencia de potencial entre los puntos a y d. C1
C2
a C3 b C4
d
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24.17 En la figura 24.7a, sean C 1= 3.00 μF, C 2= 5.00 μF y V ab = +52.0 V. Calcule a) la carga de cada capacitor; b) la diferencia de potencial entre los bornes de cada capacitor.
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24.20 Con respecto a la situacion que se muestra en la figura 24.8a, suponga que Vab = +36 V. Calcule a) la carga de cada capacitor; b) la diferencia de potencial entre los bornes de cada capacitor. c) La carga de red en su totalidad es Q= CeqVab, donde C eq = 6 μF segun el ejemplo 24.5 (seccion 24.2). Explique por que Q es igual a la carga del capacitor de 9 μF. Explique por que Q tambien es igual a la suma de la carga del capacitor de 3 μF, del capacitor de 11 μF y de ya sea el capacitor de 12 μF o el de 6 μF.
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24.21 Suponga que el capacitor de 3 μF de la figura 24.8 se quita y se sustituye por otro diferente, y que con esto la capacitancia equivalente entre los puntos a y b cambia a 8 μF. ¿Cuál seria la capacitancia del capacitor sustituto?
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24.22 En la figura 24.22 C 1 = 6.00 μF, C 2= 3.00 μF y C 3= 5.00 μF. La red de capacitores esta conectada a un potencial aplicado Vab. Cuando las cargas de los capacitores han alcanzado sus valores finales, la carga de C 2 es de 40.0 μC. a) ¿Cuales son las cargas de los capacitores C 1 y C3? b) ¿Cual es el voltaje aplicado Vab?
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24.23 En la figura 24.22, C 1 = 3.00 μF y V ab =120 V. La carga del capacitor C 1 es de 150 μC. Calcule el voltaje entre los bornes de los otros dos capacitores.
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24.24 Un capacitor de aire entre las placas paralelas tiene una capacitancia de 920 pF. La carga de cada placa es de 2.55 μC. a) ¿Cual es la diferencia de potencial entre las placas? b) Si la carga permanece constante, ¿cual sera la diferencia de potencial entre las placas si se duplica la separacion? c) ¿Cuanto trabajo se necesita para duplicar la separacion?