Task id13045
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Task id13045
A potential difference of 10 V is applied to the ends of a 1 m long lead wire. How long will it take from the moment the current begins to pass until the lead begins to melt? The melting point of lead is 327° C, the initial temperature is 20° C, the average resistivity is 1.7 10-4 ohm cm, the average specific heat is 0.125 J/g deg, the density is 11.3 g/cm3. Neglect heat loss to the surrounding space.
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Detailed solution. Format gif
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