Question

1. A conducting wire made of aluminum has approximately 1.5x10²⁰ free electrons for every centimeter of its length. The electrons have a drift speed of 0.03 cm/s. How many electrons pass a point in the wire each second? a). 2.310¹⁸ e^-/s b).  1.5x10¹⁸ e^-/s c) 0.5x10¹⁸ e^-/s. d) 4.5x10¹⁸ e^-/s

2.For the conductor in question #2, assume that it has a cylindrical shape with a radius of 1.4 mm. Find the current density in the conductor assuming that it is uniform. a) 5.8x10⁵A/m² b) 1.2x10⁵A/m² c) 8.0x10⁵A/m² d)  3.7x10⁵A/m²

3. If a 1.0 m length of a certain wire has a resistance of 0.20Ω, determine the resistance of 120.0 m of the same wire.a)  24 Ω b)  48 Ω c) 96 Ω. d) 128 Ω

Answer 1