A voltmeter connected across the terminals of a tungsten-filament light bulb measures 113 V when an ammeter in line with the bulb registers a current of 0.664 A. HINT
(a) Find the resistance of the light bulb. (Enter your answer in ohms.) Ω
(b) Find the resistivity of tungsten (in Ω · m) at the bulb's operating temperature if the filament has an uncoiled length of 0.573 m and a radius of 2.43 ✕ 10⁻5 m. Ω · m