The hall effect can be used to determine the density of mobile electrons in a conductor. a thin strip of the material being investigated is immersed in a magnetic field and oriented so that its surface is perpendicular to the field. in a particular measurement, the magnetic field strength was 0.875 t, the strip was 0.102 mm thick, the current along the strip was 3.89 a, and the hall voltage between the strip's edges was 1.59 mv. find the density of mobile electrons in the material.

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Ascientific blank must be testable and capable of being proven false?

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=