Showing 131 to 140 of 528 Questions
  • A parallel-plate capacitor has plates with area 0.0225 m2 separated by 1.00 mm of Teflon. (a) Calculate the charge on the plates when they are charged to a potential difference of 12.0 V. (b) Use Gauss's law (Eq. 24.23) to calculate the electric field inside the Teflon. (c) Use Gauss's law to calculate the electric field if the voltage so

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    509
  • A parallel-plate capacitor has rectangular plates of length L = 10 cm and width W = 4 cm (Figure). The region between the plates is filled with a dielectric slab of dielectric constant κ = 4 which can slide along the length of the capacitor. Initially, the slab completely fills the rectangular region, and the capacitor holds a charge

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    86
  • A parallel-plate capacitor has the space between the plates filled with two slabs of dielectric, one with constant K1 and one with constant K2 (Fig). Each slab has thickness d/2, where d is the plate separation. Show that the capacitance is.

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    154
  • A parallel-plate capacitor has the space between the plates filled with two slabs of dielectric, one with constant K1 and one with constant K2 (Fig). The thickness of each slab is the same as the plate separation d, and each slab fills half of the volume between the plates. Show that the capacitance is

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    226
  • A parallel-plate capacitor has the volume between its plates filled with plastic with dielectric constant K. The magnitude of the charge on each plate is Q. Each plate has area a. and the distance between the plates is d. (a) Use Gauss's law as stated in Eq. (24.23) to calculate the magnitude of the electric field in the dielectric. (b) U

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    1186
  • A parallel-plate capacitor in air has a plate separation of 1.50 cm and a plate area of 25.0 cm2. The plates are charged to a potential difference of 250 V and disconnected from the source. The capacitor is then immersed in distilled water. Determine (a) The charge on the plates before and after immersion, (b) The capacitance and pote

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    141
  • A parallel-plate capacitor is charged and then disconnected from a battery. By what fraction does the stored energy change (increase or decrease) when the plate separation is doubled?

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    106
  • A parallel-plate capacitor is constructed using a dielectric material whose dielectric constant is 3.00 and whose dielectric strength is 2.00 x 108 V/m. The desired capacitance is 0.250 μF, and the capacitor must withstand a maximum potential difference of 4 000 V. Find the minimum area of the capacitor plates.

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    121
  • A parallel-plate capacitor is constructed by filling the space between two square plates with blocks of three dielectric materials, as in Figure P26.61. You may assume that ℓ, d. (a) Find an expression for the capacitance of the device in terms of the plate area A and d, 11, 12, and 13. (b) Calculate the capacitance using the valu

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    366
  • A parallel-plate capacitor is constructed from a layer of silicon dioxide of thickness 5 × 10-6 m between two conducting films. The dielectric constant of silicon dioxide is 3.8 and its dielectric strength is 8 × 106 V/m. (a) What voltage can be applied across this capacitor without dielectric breakdown? (b) What should the surface area

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    105
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