Solved: A fuse is a device designed to break a circuit,

Chapter 25, Problem 22DQ

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QUESTION:

You apply a potential difference of 4.50 V between the ends of a wire that is 2.50 m in length and 0.654 mm in radius. The resulting current through the wire is 17.6 A. What is the resistivity of the wire?

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QUESTION:

You apply a potential difference of 4.50 V between the ends of a wire that is 2.50 m in length and 0.654 mm in radius. The resulting current through the wire is 17.6 A. What is the resistivity of the wire?

ANSWER:

Solution 22DQ

Step 1:

The material of the fuse should have low resistance and low melting point.

According to the Joule’s law of heating,

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