All other conditions being equal, why is the induced current...

Name: Problem 69, Chapter 21: College Physics Explore and Apply
Uploaded: 2020-05-16T19:11:34-08:00
Duration: 1 min 48 s
Channel: Anna Zeng
Description: All other conditions being equal, why is the induced current greater in claypan soil than in topsoil? (a) Claypan soil has a higher concentration of magnetic ions compared to topsoil. (b) Claypan soil is partly metallic in composition. (c) Claypan soil has greater density than loose topsoil. (d) The clay is closely packed, moist, and a better electrical conductor than loose, dry topsoil.

All other conditions being equal, why is the induced current greater in claypan soil than in topsoil? (a) Claypan soil has a higher concentration of magnetic ions compared to topsoil. (b) Claypan soil is partly metallic in composition. (c) Claypan soil has greater density than loose topsoil. (d) The clay is closely packed, moist, and a better electrical conductor than loose, dry topsoil.

All other conditions being equal, why is the induced current greater in claypan soil than in topsoil?
(a) Claypan soil has a higher concentration of magnetic ions compared to topsoil.
(b) Claypan soil is partly metallic in composition.
(c) Claypan soil has greater density than loose topsoil.
(d) The clay is closely packed, moist, and a better electrical conductor than loose, dry topsoil.

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Key Concepts

Electromagnetic Induction

This is the process where a changing magnetic field produces an electric current in a conductor. In the context of soils, when a varying magnetic field is applied, currents are induced in the soil, and the magnitude of these currents depends on the material's conductive properties.

Electrical Conductivity

Electrical conductivity refers to a material's ability to allow the flow of electric charge. In soils, conductivity is influenced by factors such as moisture, ion concentration, and how closely particles are packed together, which facilitate the movement of charge.

Soil Moisture and Ionic Mobility

Moisture in soil plays a crucial role in conductivity because water acts as a medium in which ions can move freely. The presence of moisture enhances the movement of ionic species, thereby reducing resistance and increasing induced current.

Soil Texture and Compaction

The physical structure of soil, including how particles are arranged and compacted, significantly affects its conductivity. Densely packed soils, like clay in a claypan, reduce the distance that ions must move and increase the efficiency of electrical conduction compared to loose, dry soils.

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