The filament of a lamp rated as 60 W at 120 V has resistivity 3.6×10−7Ω m .
a. a Calculate the resistance of the lamp when it is connected to a source of 120 V.
b. b The radius of the filament is 0.042 mm. Determine its length.
c. c Referring to your answer to part b, suggest how the filament can fit within the light bulb.