HW_7_Assignment

# HW_7_Assignment - U 2 for capacitor 2? 4. 25-50: Figure...

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HW 7 due online Wednesday, February 9, 2011 at 1 AM 1. 25-4: The plates of a spherical capacitor have radii 38.0 mm and 40.0 mm. (a) Calculate the capacitance. (b) What must be the plate area of a parallel-plate capacitor with the same plate separation and capacitance? 2. 25-9: Each of the uncharged capacitors in Fig. 25-27 has a capacitance of 25.0 μ F. A potential difference of V = 4200 V is established when the switch is closed. How many coulombs of charge then pass through meter A? 3. 25-34: In Fig. 25-28, a potential difference V = 100 V is applied across a capacitor arrangement with capacitances C 1 = 10.0 μ F, C 2 = 5.00 μ F, and C 3 = 4.00 μ F. What are (a) charge q 3 , (b) potential difference V 3 , and (c) stored energy U 3 for capacitor 3, (d) q 1 , (e) V 1 , and (f) U 1 for capacitor 1, and (g) q 2 , (h) V 2 , and (i)

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Unformatted text preview: U 2 for capacitor 2? 4. 25-50: Figure 25-49 shows a parallel-plate capacitor of plate area A = 10.5 cm 2 and plate separation 2 d = 7.12 mm. The left half of the gap is filled with material of dielectric constant κ 1 = 21.0; the top of the right half is filled with material of dielectric constant κ 2 = 42.0; the bottom of the right half is filled with material of dielectric constant κ 3 = 58.0. What is the capacitance? 5. 25-54: Two parallel plates of area 100 cm 2 are given charges of equal magnitudes 8.9 × 10-7 C but opposite signs. The electric field within the dielectric material filling the space between the plates is 1.4 × 10 6 V/m. (a) Calculate the dielectric constant of the material. (b) Determine the magnitude of the charge induced on each dielectric surface....
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## This note was uploaded on 02/07/2011 for the course PHY 21 taught by Professor Hickman during the Spring '08 term at Lehigh University .

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HW_7_Assignment - U 2 for capacitor 2? 4. 25-50: Figure...

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