Explanation Given info: The length of the wire is 6.9 m and the diameter is 0.79 mm . The resistivity of the silver wire is 1.59 × 10 − 8 Ω ⋅ m . Formula to calculate the resistance of a wire is, R = ρ L A (1) Here, R is the resistance of the wire. L is the length of the wire. A is are of cross-section of wire. ρ is the resistivity of the wire material. The expression for cross-section of the wire is, A = π d 2 4 Here, A is the area of cross-section of the wire. d is the diameter of the wire. Substitute π d 2 4 for A in equation (1). R = ρ L π d 2 4 = 4 ρ L π d 2 Substitute 6.9 m for L , 0

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ISBN: 9780321976444

Author: James S. Walker

Publisher: PEARSON

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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 21, Problem 9PCE

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The resistance of the wire.

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Chapter 21, Problem 8PCE

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The resistance of the wire.

Solution Summary: The author explains that the resistance of a wire is 0.22Omega and the resistivity of the silver wire.

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The resistance of the wire.

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