3.а)i)A potential difference of 1.5 V is applied across a tungsten wire of length2.4 m and cross- sectional area 0.550 mm?. What is the magnitude ofcurrent in the wire? (Resistivity of tungsten, p =5.6 x 108 2 m)ii)The resistance of a filament of a bulb is 200 when the bulb is lit upand 12 2 when it is not lit. Calculate the temperature of the filamentwhen alight. The room temperature is 30° C and the temperaturecoefficient of the filament is 4.5 x 103 °C'.

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A potential difference of 1.5 V is applied across a tungsten wire of length 2.4 m and cross- sectional area 0.550 mm². What is the magnitude of current in the wire? (Resistivity of tungsten, p =5.6 x 108 2 m)

A potential difference of 1.5 V is applied across a tungsten wire of length 2.4 m and cross- sectional area 0.550 mm². What is the magnitude of current in the wire? (Resistivity of tungsten, p =5.6 x 108 2 m)

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter17: Current And Resistance

Section: Chapter Questions

Problem 11P

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