FIGURE 27-8 -A Voltmeter Is Used to Measure the Voltage Across a Voltage

FIGURE 27-8
-A voltmeter is used to measure the voltage across a Hall strip conducting a current in the negative y-direction as shown in Fig. 27-8. The charge carriers are known to be positive in this strip. What is the direction of the magnetic field used in this experiment if the reading on the voltmeter is negative when the probes are connected as shown?

A) negative x direction
B) positive x direction
C) positive z direction
D) negative z direction
E) positive y direction