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Solved: A fuse is a device designed to break a circuit,
Chapter 25, Problem 22DQ(choose chapter or problem)
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?
Questions & Answers
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,