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Amal Jeeva
Amal JeevaLv10
18 May 2019
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23 Jan 2021

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

A hollow metal cylinder has an inner radius , outer radius , length , and conductivity . The current is radially outward from the inner surface to the outer surface.

a. Find an expression for the electric field strength inside the metal as a function of the radius r from the cylinder’s axis.

b. Evaluate the electric field strength at the inner and outer surfaces of an iron cylinder if , , , and .

A resistor is constructed by forming a material of resistivity 2.3× 10^5 · m into a shape
of a hollow cylindrical shell of length 3 cm and inner radius of0.32 cm and outer radius 1.3 cm. In use, a potential difference isapplied between the ends of the cylinder, producing a currentparallel to the length of the
cylinder. Find the resistance of the cylinder.
Answer in units of M

With the question
An oceanographer is studying how the ion concentration in seawaterdepends on depth. She makes a measurement by lowering into thewater a pair of concentric metallic cylinders at the end of a cableand taking data to determine the resistance between theseelectrodes as a function of depth. The water between the twocylinders forms a cylindrical shell of inner radius ra, outerradius rb, and length L much larger than rb. The scientist appliesa potential difference ?V between the inner and outer surfaces,producing an outward radial current I. Let ? represent theresistivity of the water.
We realize that we integrate resistivity(Length/area) but then fromthe solution shown we integrate dR= resistivity(dr/(2pirL)) Weunderstand everything but why the L goes to the bottom of thisintegration.
Thanks.

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