1. A thin wire of silver (Z=47, A = 107.87, face-centered-cubic, density = 10.49 g/cm³) is measured at 15 m long and 0.025 m in diameter and has an electrical resistance of 0.05 Q. Assume that each Agatom contributes three conduction electrons to the metal. (a) What is the concentration of conduction electrons in Ag (number/m³)? (b) What is the mean free time between collisions for the electrons in Ag (in s)? (c) What is the drift velocity of electrons if an 8 V/m electric field is applied? (d) Calculate the current density in the wire (in A/m²) from the applied electric field in part (c).

Fig: 1