A Conductor of Radius R, Length and Resistivity ρ

question 21

Multiple Choice

A conductor of radius r, length and resistivity ρ has resistance R. What is the new resistance if it is stretched to 4 times its original length?

• A) R
• B) R
• C)R
• D)4R
• E)16R

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Definitions:

Limestone

A sedimentary rock composed mainly of calcium carbonate, often formed from the skeletal remains of marine organisms.

Calcite

A common crystalline form of natural calcium carbonate, CaCO3, that is the primary constituent of limestone and marble.

Precipitation

Any kind of water, be it liquid or frozen, that drops from the sky to the ground, covering all forms such as rain, snow, sleet, and hail.

Sinkhole

A depression or hole in the ground caused by the collapse of a surface layer, often due to the dissolution of underlying limestone.