AP Physics 2 : Resistivity

Study concepts, example questions & explanations for AP Physics 2

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Example Questions

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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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