### The drift velocity and Hall voltage.

The number density of free electrons in copper is 8.47 x 10 ^22 electrons per cubic centimeter. If a metal strip of copper 2 cm by 0.1 cm (thickness), magnetic field pointing up to top of paper, and a current og 10A, fins a) the drift velocity Vsubd and b) the Hall voltage (Assume the magnetic field is 2.0 T.)