A voltmeter connected across the terminals of a tungsten-filament light bulb measures 117 V when an ammeter in line with the bulb registers a current of 0.513 A. (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 2.38 ✕ 10−5 m. Ω· m

A voltmeter connected across the terminals of a tungsten-filament light bulb measures 117 V when an ammeter in line with the bulb registers a current of 0.513 A. (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 2.38 ✕ 10−5 m. Ω· m

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Question

A voltmeter connected across the terminals of a tungsten-filament light bulb measures 117 V when an ammeter in line with the bulb registers a current of 0.513 A.

(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 2.38 ✕ 10⁻⁵ m.

Ω· m

Expert Solution