Q- An aluminum rod has a resistance of 1.234 Ohm at 20.0°C. Calculate the resistance of the rod at 120°C by accounting for the changes in both the resistivity and its dimensions. (Resistivity of aluminum at 200C is 2.75*10-8 Ohm.m, temperature coefficient of resistivity is 4.4*10-3/0C and the coefficient of linear expansion of aluminum is a = 23*10-6/0C)
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