A Certain Fuse "Blows" If the Current in It Exceeds

question 23

Multiple Choice

A certain fuse "blows" if the current in it exceeds 1.0 A, at which instant the fuse melts with a current density of 620 A/cm². What is the diameter of the wire in the fuse?

• A) 0.45 mm
• B) 0.63 mm
• C) 0.68 mm
• D) 0.91 mm

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