What is the typical magnitude of the Hall Effect sensor voltage?

• A. Large
• B. Small
• C. Moderate
• D. None

Answer: (B)

The voltage produced by a Hall effect sensor is typically small. The Hall voltage is generated when a current flows through a material and a magnetic field applied perpendicular to that current deflects charge carriers, creating a voltage across the sensor. Although the voltage is proportional to the magnetic field and the current, the device geometry and material properties keep it quite small in normal operation—often in the millivolts range for practical fields. Because the signal is so small, sensor designs rely on amplification and careful handling of offsets and noise to make the output usable. It isn’t large, and it isn’t zero under a magnetic field, so the best description is a small voltage.