Explanation Given Info: The expression for resistivity of a metal in terms of temperature is given as ρ = ρ o [ 1 + α ( T − T o ) ] − − − − − − ( i ) Here, Reference temperature T o = 20 ° C Coefficient of resistivity for copper α = 3.9 × 10 − 3 ° C -1 Resistance of copper wire at T o = 20 ° C , R o = 0.25 Ω Let ‘ T ’ be the temperature at which the resistance of copper wire is R = 0.30 Ω Formula Used: Relation between resistance and resistivity is given as ρ = R A L Resistance in terms of temperature is given as R = R o [ 1 + α ( T − T o ) ] Calculation: Consider copper wire having length ‘L’ and area of cross-section ‘A’

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (Chs 1-42) Plus Mastering Physics with Pearson eText -- Access Card Package (4th Edition)

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Author: Randall D. Knight (Professor Emeritus)

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Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting …

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Chapter 27, Problem 49EAP

To determine

The temperature of metal at which it has the resistance 0.3 Ω.

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Chapter 27, Problem 48EAP

Chapter 27, Problem 50EAP

Chapter 27 Solutions

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (Chs 1-42) Plus Mastering Physics with Pearson eText -- Access Card Package (4th Edition)

Ch. 27 - Prob. 1CQ Ch. 27 - Prob. 2CQ Ch. 27 - The electron drift speed in a wire is exceedingly...Ch. 27 - Prob. 4CQ Ch. 27 - Prob. 5CQ Ch. 27 - All the wires in FIGURE Q27.6 are made of the same...Ch. 27 - Both batteries in FIGURE Q27.7 are ideal and...Ch. 27 - Both batteries in FIGURE Q27.8 are ideal and...Ch. 27 - The wire in FIGURE Q27.9 consists of two segments...Ch. 27 - Prob. 10CQ

Ch. 27 - ll. The wires in FIGURE Q27.11 are all made of the...Ch. 27 - Which, if any, of these statements are true? (More...Ch. 27 - Prob. 1EAP Ch. 27 - Prob. 2EAP Ch. 27 - .0 × 1016 electrons flow through a cross section...Ch. 27 - Prob. 4EAP Ch. 27 - Prob. 5EAP Ch. 27 - Prob. 6EAP Ch. 27 - Prob. 7EAP Ch. 27 - Prob. 8EAP Ch. 27 - Prob. 9EAP Ch. 27 - Prob. 10EAP Ch. 27 - Prob. 11EAP Ch. 27 - The current in an electric hair dryer is 10.0 A....Ch. 27 - 13. When a nerve cell fires, charge is...Ch. 27 - Prob. 14EAP Ch. 27 - Prob. 15EAP Ch. 27 - Prob. 16EAP Ch. 27 - Prob. 17EAP Ch. 27 - Prob. 18EAP Ch. 27 - Prob. 19EAP Ch. 27 - Prob. 20EAP Ch. 27 - Prob. 21EAP Ch. 27 - Prob. 22EAP Ch. 27 - Prob. 23EAP Ch. 27 - 24. The two segments of the wire in FIGURE EX27.24...Ch. 27 - A 1.5 V battery provides 0.50 A of current. a. At...Ch. 27 - Prob. 26EAP Ch. 27 - Prob. 27EAP Ch. 27 - Prob. 28EAP Ch. 27 - Prob. 29EAP Ch. 27 - Prob. 30EAP Ch. 27 - Prob. 31EAP Ch. 27 - Prob. 32EAP Ch. 27 - Prob. 33EAP Ch. 27 - Prob. 34EAP Ch. 27 - Prob. 35EAP Ch. 27 - Prob. 36EAP Ch. 27 - Prob. 37EAP Ch. 27 - Prob. 38EAP Ch. 27 - Prob. 39EAP Ch. 27 - Prob. 40EAP Ch. 27 - Prob. 41EAP Ch. 27 - Prob. 42EAP Ch. 27 - Prob. 43EAP Ch. 27 - Prob. 44EAP Ch. 27 - Prob. 45EAP Ch. 27 - Prob. 46EAP Ch. 27 - Prob. 47EAP Ch. 27 - Prob. 48EAP Ch. 27 - Prob. 49EAP Ch. 27 - Variations in the resistivity of blood can give...Ch. 27 - The conducting path between the right hand and the...Ch. 27 - The conductive tissues of the upper leg can be...Ch. 27 - The resistivity of a metal increases slightly with...Ch. 27 - Prob. 54EAP Ch. 27 - You need to design a 1.0 A fuse that “blows” if...Ch. 27 - I A hollow metal cylinder has inner radius a....Ch. 27 - A hollow metal sphere has inner radius a, outer...Ch. 27 - The total amount of charge in coulombs that has...Ch. 27 - The total amount of charge that has entered a wire...Ch. 27 - The current in a wire at time t is given by the...Ch. 27 - The current supplied by a battery slowly decreases...Ch. 27 - The two wires in FIGURE P27.62 are made of the...Ch. 27 - What diameter should the nichrome wire in FIGURE...Ch. 27 - An aluminum wire consists of the three segments...Ch. 27 - A wire of radius R has a current density that...Ch. 27 - A 0.60 -mm-diameter wire made from an alloy (a...Ch. 27 - A 20 -cm-long hollow nichrome tube of inner...Ch. 27 - Prob. 68EAP Ch. 27 - Prob. 69EAP Ch. 27 - Prob. 70EAP Ch. 27 - Prob. 71EAP Ch. 27 - Prob. 72EAP Ch. 27 - Prob. 73EAP Ch. 27 - Prob. 74EAP Ch. 27 - Prob. 75EAP Ch. 27 - Prob. 76EAP

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