Examine the dependence of resistivity and resistance of a wire on temperature and how it affects the potential difference across the terminals of the wire. 

A current of   60  mA flows through a wire of length L= 1.65 m long and diameter of d=1.1 mm at a temperature of T₀=  20  °C; the wire's resistivity at this temperature is ρ₀=  5.33×10^-8 Ω · m. The coefficient of resistivity of the material is α=  4.6×10^-3/C

What is the resistance of the wire at  20  °C?

What is the potential difference across the ends of this wire at   20  °C in milli-volts (mV) ?

If the wire temperature increases to   106  C°, what potential difference (in mV) across its ends is now required to produce a current of   60  mA?