1. An incandescent light bulb consists of a tungsten filament of relatively high resistivity. The passing current heats up the filament until it glows and emits light. The tungsten filament of length 58.0 cm and radius 2.30x10^-5 m is coiled to reduce the size of the light bulb. How much current is passing through the light bulb tungsten filament if it is connected to a 120. V power source? Assume the temperature is 2000. (A REALLY rough estimate since filament temperature increases) 2. A particle of charge +4e gains 193 eV of kinetic energy when moving between two parallel plates connected to a power source. What is the potential difference between the plates?
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