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Unformatted text preview: Lehigh University January 26, 2008 Physics 21, Spring 2008 Home Work Assignment (7-8) Note: Solutions to the problems must be submitted on WileyPLUS (www.wileyplus.com). HW-7 due February 5 7-1. (HRW 25-53) The space between two concentric conducting spherical shells of radii b = 1.70 cm and a = 1.20 cm is filled with a substance of dielectric constant κ = 23.5. A potential difference V = 73.0 V is applied across the inner and outer shells. Determine (a) the capacitance of the device, (b) the free charge q on the inner shell, and (c) the charge q ′ induced along the surface of the inner shell. 7-2. (HRW 25-71) A certain capacitor is charged to a potential difference V. If you wish to increase its stored energy by 10%, by what percentage should you increase V? 7-3. (HRW 26-2) An isolated conducting sphere has a 10 cm radius. One wire carries a current of 1.000 002 0 A into it. Another wire carries a current of 1.000 000 0 A out of it. How long would it take for the sphere to increase in potential by 1000 V? sphere to increase in potential by 1000 V?...
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This note was uploaded on 02/20/2008 for the course PHYSIC 2 taught by Professor Kim during the Spring '08 term at Lehigh University .
- Spring '08