Consider a situation in which two conducting spheres are far apart, but connected by a long thin conducting wire. The surface of the large sphere is at a potential of 1000 V above ground. The large sphere has a radius of 15 cm and the small sphere has a radius of 2 cm. a) Find the electric field at the surface of each of the spheres. b) Find the total charge on each of the spheres

Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.