You were given a 13.7-cm long section of a mysterious looking conducting wire and asked to figure out what it was made of. No problem! You measured its diameter, and determined that wire had a cross-sectional area of 1.75 x 10-6 m², then you connected the wire across a 1.5-V battery, and measured the current -- and the temperature. (a) The 0.576-A current running through the bare wire quickly raised its temperature to 118°C. What were the electrical conductivity and electrical resistivity of the wire at that temperature? 22-1-m-1 22.m P = (b) What was its resistance at that temperature? R=

You were given a 13.7-cm long section of a mysterious looking conducting wire and asked to figure out what it was made of. No problem! You measured its diameter, and determined that wire had a cross-sectional area of 1.75 x 10-6 m², then you connected the wire across a 1.5-V battery, and measured the current -- and the temperature. (a) The 0.576-A current running through the bare wire quickly raised its temperature to 118°C. What were the electrical conductivity and electrical resistivity of the wire at that temperature? 22-1-m-1 22.m P = (b) What was its resistance at that temperature? R=