If the resistivity of a wire is measured to be 2.91 x 10-8 Ωm at a temp. of 20 degrees Celsius and the temp coefficient of resistivity is 0.0057 1/C,
(a.) What would be the resistivity of the wire at a temp of 35 degrees Celsius?
(b.) What would be the resistance of the wire at a temp of 20 degrees Celsius if its length is 25 m and its cross sectional area is 0.25 cm2 ?
(c.) What would be the resistance of the wire in parts (a.) and (b.) at 35 degrees Celsius?