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When a straight wire is warmed, its resistance is given by according to the equation, where a is the temperature coefficient of resistivity. This expression needs to be modified if we include the charge in the dimensions of the wire due to thermal expansion. For a copper wire of radius 0.1000 mm and length 2.000 m, find its resistance at , including the effects of both thermal expansion and temperature variation of resistivity. Assume the coefficients are known to four significant figures.
When a straight wire is warmed, its resistance is given by according to the equation, where a is the temperature coefficient of resistivity. This expression needs to be modified if we include the charge in the dimensions of the wire due to thermal expansion. For a copper wire of radius 0.1000 mm and length 2.000 m, find its resistance at , including the effects of both thermal expansion and temperature variation of resistivity. Assume the coefficients are known to four significant figures.
SumantLv10
30 Jan 2021