Explanation Given that the resistivity of body fluid is 0.15 ohm ⋅ m . Assume that the finger is a cylindrical conductor. The average length of the finger of male adult is about 7 cm , and the radius is 0.4 cm . Write the expression for the resistance in terms of dimensions of the conductor. R = ρ l A (I) Here, R is the resistance, ρ is the resistivity, l is the length, and A is the cross sectional area. Write the expression for the cross sectional area of the cylindrical conductor. A = π r 2 (II) Here, r is the radius. Use equation (II) in (I). R = ρ l π r 2 (III) Conclusion: Substitute 0.15 ohm ⋅ m for ρ , 7 cm for l , and 0

2nd Edition

ISBN: 9780471522782

Author: Morton M. Sternheim

Publisher: WILEY

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Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends o…

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Chapter 17, Problem 62E

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The resistance of a finger end to end.

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Chapter 17, Problem 61E

Chapter 17, Problem 63E

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A capacitor with a capacitance of C = 5.95×10−5 F is charged by connecting it to a 12.5 −V battery. The capacitor is then disconnected from the battery and connected across an inductor with an inductance of L = 1.55 H . At the time 2.35×10−2 s after the connection to the inductor is made, what is the current in the inductor? At that time, how much electrical energy is stored in the inductor?

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Chapter 17 Solutions

General Physics, 2nd Edition

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