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Example Questions
Example Question #71 : Circuits
A scientist carves out a cylinder of a new material she developed. It is tall, with a radius of
. She puts electrodes on each face of the cylinder. She determines the resistance to be
. What is the resistivity of this new material?
Possible Answers:
None of these
Correct answer:
Explanation:
Using the relationship:
Here, is the resistivity,
is the resistance,
is cross sectional area, and
is the length.
The area of a circle is:
Substitute:
Plug in given values and solve.
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