Answer Happy

Consider that in the figure below, an electric current in the positive x direction can be created by positive charges moving positive along the x-axis or negative charges moving negative along the x-axis. The current flows to the right through a rectangular bar of conducting material in the presence of a uniform magnetic field B point out of the page. Draw diagrams showing the electric and magnetic forces on the charges to convince yourself that, in spite of this fact, positive charge carriers will produce a positive Hall coefficient and negative charge carriers will produce a negative Hall coefficient.| 1 B (4)