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