A voltmeter connected across the terminals of a tungsten-filament light bulb measures 112 V when an ammeter in line with the bulb registers a current of 0.536 A.HINT(a) Find the resistance of the light bulb. (Enter your answer in ohms.)22(b) Find the resistivity of tungsten (in · m) at the bulb's operating temperature if the filament has an uncoiled length of 0.553 m and a radius of 2.43 x 10-5 m.Ω · m

Answered: A voltmeter connected across the…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A voltmeter connected across the terminals of a tungsten-filament light bulb measures 112 V when an ammeter in line with the bulb registers a current of 0.536 A.
HINT
(a) Find the resistance of the light bulb. (Enter your answer in ohms.)
22
(b) Find the resistivity of tungsten (in · m) at the bulb's operating temperature if the filament has an uncoiled length of 0.553 m and a radius of 2.43 x 10-5 m.
Ω · m

Expert Solution

Step 1

Given:-

A voltmeter connected across the terminals of a tungsten-filament light bulb measures V = 112 V.

An ammeter in line with the bulb registers a current of I = 0.536A.

Find:-

(a) Find the resistance of the light bulb.

(b) Find the resistivity of tungsten (in Ω·m) at the bulb's operating temperature if the filament has an uncoiled length of L = 0.553 m and a radius of r = 2.43 × 10^-5 m.

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