Questions from Modern Physics


Q: Current materials-science technology allows engineers to construct capacitors with much

Current materials-science technology allows engineers to construct capacitors with much higher values of C than were previously possible. A capacitor has C = 3000 F and is rated to withstand a maximum...

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Q: In Fig. E24.20, C1 = 3.00

In Fig. E24.20, C1 = 3.00 µF and Vab = 150 V. The charge on capacitor C1 is 150 µC and the charge on C3 is 450 µC. What are the values of the capacitances of C2...

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Q: The capacitors in Fig. P24.56 are initially uncharged and

The capacitors in Fig. P24.56 are initially uncharged and are connected, as in the diagram, with switch S open. The applied potential difference is Vab = +210 V. Fig. P24.56: (a). What is the pote...

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Q: A parallel-plate capacitor is connected to a power supply that

A parallel-plate capacitor is connected to a power supply that maintains a fixed potential difference between the plates. (a). If a sheet of dielectric is then slid between the plates, what happens t...

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Q: Three capacitors having capacitances of 8.4, 8.4

Three capacitors having capacitances of 8.4, 8.4, and 4.2 µF are connected in series across a 36-V potential difference. (a). What is the charge on the 4.2-µF capacitor? (b). What is the total energy...

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Q: In Fig. P24.59, each capacitance C1 is 6

In Fig. P24.59, each capacitance C1 is 6.9 µF, and each capacitance C2 is 4.6 µF. Fig. P24.59: (a). Compute the equivalent capacitance of the network between points a and...

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Q: Each combination of capacitors between points a and b in Fig.

Each combination of capacitors between points a and b in Fig. P24.60 is first connected across a 120-V battery, charging the combination to 120 V. These combinations are then connected to make the cir...

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Q: A parallel-plate capacitor with only air between the plates is

A parallel-plate capacitor with only air between the plates is charged by connecting it to a battery. The capacitor is then disconnected from the battery, without any of the charge leaving the plates....

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Q: A potential difference Vab = 48.0 V is applied across

A potential difference Vab = 48.0 V is applied across the capacitor network of Fig. E24.17. If C1 = C2 = 4.00 mF and C4 = 8.00 mF, what must the capacitance C3 be if the network is to store 2.90 &Atil...

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Q: A parallel-plate capacitor is made from two plates 12.

A parallel-plate capacitor is made from two plates 12.0 cm on each side and 4.50 mm apart. Half of the space between these plates contains only air, but the other half is filled with PlexiglasÂ&...

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