|Oct17-06, 11:00 PM||#1|
Finding diameter of a wire based on the current and current density.
You need to design a 0.9 A fuse that "blows" if the current exceeds 0.9 A. The fuse material in your stockroom melts at a current density of 540 A/cm2. What diameter wire of this material will do the job?
Solving for x gives the answer: .166666666666667
The result of that answer multiplied by 2 gives 4.607m. The answer asks for it in mm so I converted to 460.7mm and it says its wrong. Where did I go wrong, I'm just using the current density formula: J=I/A
Where J is the current density
I is the current
A is the area
|Oct18-06, 12:22 AM||#2|
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