Biological nanowires produced by Geobacter sulfurreducens are used to carry electrons produced during respiration away from the bacterium. The wires, called pili, are typically 2.65 nm in diameter and 17.5 μm in length. (a) If the resistivity of the Geobacter pill has been measured to be 21.50 cm, what is the total resistance (in 2) of a typical Geobacter nanowire? (b) If a potential drop of 0.100 V is established across the ends of the wire, what is the current (in A) that exists in the 17.5 µm length of the wire?

Biological nanowires produced by Geobacter sulfurreducens are used to carry electrons produced during respiration away from the bacterium. The wires, called pili, are typically 2.65 nm in diameter and 17.5 μm in length. (a) If the resistivity of the Geobacter pill has been measured to be 21.50 cm, what is the total resistance (in 2) of a typical Geobacter nanowire? (b) If a potential drop of 0.100 V is established across the ends of the wire, what is the current (in A) that exists in the 17.5 µm length of the wire?

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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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Concept explainers

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 on the nature of the material of the conductor and is unaffected by its dimensions.

Question

Biological nanowires produced by Geobacter sulfurreducens are used to carry electrons produced during respiration away from the bacterium. The
wires, called pili, are typically 2.65 nm in diameter and 17.5 μm in length.
(a) If the resistivity of the Geobacter pill has been measured to be 21.50 cm, what is the total resistance (in 2) of a typical Geobacter
nanowire?
Ω
(b) If a potential drop of 0.100 V is established across the ends of the wire, what is the current (in A) that exists in the 17.5 μm length of the
wire?
A

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