Suppose a wire made from an unknown alloy and having a temperature of 20.0°C carries a current of 0.529 A. At 52.4°C the current is 0.378 A for the same potential difference. Find the temperature coefficient of resistivity of the alloy. tempinital = 20C tempfinal = 52.4C currentInital = .529A currentFinal = .378A Voltage = constant but unknown how do you go about this problem i have tried manipulating ohms law ( I= V/R ) to remove voltage but that always leaves me with IR= IR. TCOR = temperature coefficient of resistivity; because the resistance isn't a constant i cant factor it out of RF = RI (1 - TCOR(TF - TI)) i cant use either form because i don't have resistance to solve for resistivity. if someone could point me in the right direction that would be great.