Quiz 2 Name:ID:1. A solid insulating sphere with radius R has net charge Q evenly distributed in the whole volume. Calculate the electric field, electric potential in space with this sphere in it. 2. Use a spherical capacitor to prove that (a) the capacitance is (b) the stored electric field energy density isababC−=04πε2021EuEε=4. A circuit with silver wiring operates at 20.0°C. If you were to replace the silver with copper wiring of the exact same dimensions, at what temperature would you have to run the circuit in order to have the resistance of the copper circuit be the same as that of the silver circuit? The temperature coefficient of resistivity for silver is 0.0038/degreeC, for copper is 0.00393/degreeC at 20.0°C.5. A nuclear power plant generates 500 MW power for a city 400 km away (transmission line distance). The transmission line is aluminum (resistivity is 2.7E-8Ωm at 20 degreeC) and has a diameter of 25 mm. In order to control the transmission loss to be below 10%, what would be the transmission voltage?6. A cylindrical capacitor has inner radius 5.52 cm and outer radius 5.61 cm. When connected to a 115 V potential difference, the capacitor holds 12.5μJ of energy. How tall is the
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