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?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 15P: If the current carried by a conductor is doubled, what happens to (a) the charge carrier density,...

See similar textbooks

Similar questions

What current flows through a 2.74 cm diameter rod of pure silicon that is 25.0 cm long, when 1000 V is applied to it? (Such a rod may be used to make nuclear particle detectors, for example.) The resistivity of pure silicon is 2.30 103 Ω · m. _____A
A cylindrical resistor of radius 5.0 mm and length 2.0 cm is made of material that has a resistivity of 3.5 * 10-5 ohm m.What are (a) the magnitude of the current density and (b) the potential difference when the energy dissipation rate in the resistor is 1.0W?
In a tDCS treatment procedure, 0.85 mA of current flows through a patient’s brain when there is a 7.4-V potential difference between the electrodes. Whatis the equivalent resistance between the electrodes?
During surgery, a current as small as 20.0 µA applied directly to the heart may cause ventricular fibrillation. If the resistance of the exposed heart is 253 Ω, what is the smallest voltage (in mV) that poses this danger?
What is the resistance of a copper bus bar 9.15 meter long and 7.62 cm by 1.27 cm in cross section? Use 1.78 μΩ-cm specific resistance for copper.
Consider a portable electric blanket that runs on a 4.5 V battery. If you use copper wire with a 0.5 mm diameter as the heating element, how long should the wire be (in unit of meters) if you want to generate 15 W of heating power? (Take the resistivity of the copper wire as p= 1.7 x 10^(-8) Ω.m)
Use the equation: R= (ρ*L)/A to calculate the resistance of a thin tube filled with saline solution that is 4 cm in length and has a cross-sectional area of 1 x 10^-3 m^2 ? Assume the resistivity of saline solution to be 0.1 Ω m. a.) 4Ω b.) 40Ω c.) 0.25Ω d.) 0.4Ω
What diameter must a copper wire have if its resistance is to be the same as that of an equal length of aluminum wire with diameter 3.1 mm? Take the resistivity of copper and aluminum to be 1.72 x 10-8 Ωm and 2.75 x 10-8 Ωm respectively.
A nichrome wire has a cross-sectional area 1.3 x 10-7 m2. Resistivity of nichrome = 1.1 x 10-8 Ω m and resistance of 53Ω? The length of the wire is
Cell membranes contain channels that allow ions to cross the phospholipid bilayer. Suppose that a particular potassium channel carries a current of 2.1 pA2.1 pA. How many potassium ions (K+K+) pass through it in 1.0 ms1.0 ms?
What current flows through a 2.54-cm-diameter rod of Pure silicon that is 20.0 cm long, when 1.00103 V is applied to it? (Such a rod may be used to make nuclear- particle detectors, for example.)
If the current carried by a conductor is doubled, what happens to (a) the charge carrier density, (b) the current density, (c) the electron drift velocity, and (d) the average time interval between collisions?