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Chapter 25: Q29P (page 742)
What capacitance is required to store energy of 10 kW.hat a potential difference of1000V?
The capacitance required to store energy of 10 kW.h is 72 F.
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Figure 25-20 shows three circuits, each consisting of a switch and two capacitors, initially charged as indicated (top plate positive). After the switches have been closed, in which circuit (if any) will the charge on the left-hand capacitor (a) increase, (b) decrease, and (c) remain the same?
Two air-filled, parallel-plate capacitors are to be connected to a 10 V battery, first individually, then in series, and then in parallel. Inthose arrangements, the energy stored in the capacitors turns out tobe, listed least to greatest: , , , and . Of the two capacitors, what is the (a) smaller and (b) greater capacitance?
Figure 25-58 shows a four capacitor arrangement that is connected to a larger circuit at points Aand B. The capacitances areand. The charge on capacitor 1 is. What is the magnitude of the potential difference?
A parallel plate capacitor has a capacitance of 100pF , a plate area of , and a mica dielectric () completely filling the space between the plates. At 50 V potential difference,(a) Calculate the electric field magnitude E in the mica? (b) Calculate the magnitude of free charge on the plates (c) Calculate the magnitude of induced surface charge on the mica.
A parallel plate air filled capacitor has a capacitance of 50 pF.(a)If each of its plates has an area of, what is the separation? (b)If the region between the plates is now filled with material having k = 5.6, what is the capacitance?
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