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If aluminum and copper wires of the same length have the

Chapter 20, Problem 11

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QUESTION:

Problem 11CQ

If aluminum and copper wires of the same length have the same resistance, which has the larger diameter? Why?

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QUESTION:

Problem 11CQ

If aluminum and copper wires of the same length have the same resistance, which has the larger diameter? Why?

ANSWER:

Solution 11CQ

Step 1 of 3

Resistance can be calculate from the relation,

 R =

Here, R is the resistivity, L is the length and A is the area of cross-section.

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