Question: Suppose that you are designing an electric fuse element using a eutectic tin/lead solder wire that is 0.5mm diameter by 1 cm long. The Resistivity
Suppose that you are designing an electric fuse element using a eutectic tin/lead solder wire that is 0.5mm diameter by 1 cm long. The Resistivity of 63/37 alloy is 0.145 micro-ohm-meter, the emissivity is 0.05, and the melting point is 183 C. Assume that the fuse is always in an ambient environment of 25C.
A. Assume that the resistivity of fuse wire is constant over all of the temperatures of interest and solve for the resistance of the fuse.
b. Assume that all of the power that the fuse dissipates is radiated and solve for the maximum power that the fuse can dissipate before the fuse melts.
c. What would be an appropriate current rating of this fuse? explain your answer
d. Is a eutectic metal a good choice for a fuse? why or why not?
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