A Fuse Wire of Circular Cross Section Has a Radius

question 2

Multiple Choice

A fuse wire of circular cross section has a radius of 0.8mm. The wire blows off at a current of 9(A) What will be the radius of the wire that will blow off at a current of 1A?

• A)0.2 mm
• B)0.18 mm
• C)0.28 mm
• D)0.3 mm

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Definitions:

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