The Hall Effect device voltage is typically what?

• A. Small
• B. Large
• C. Zero
• D. Variable

Answer: (A)

Hall voltage is the small transverse voltage that appears when a current flows through a conductor in a magnetic field. In typical Hall sensors, this signal is very small—usually in the millivolt range for common currents and modest magnetic fields. That small magnitude is why Hall sensors rely on amplification and careful design to extract a usable signal, and it also explains why the output changes with field and current but isn’t large under normal operating conditions. It would be zero only if there were no magnetic field or no current, and while the Hall voltage does vary with the magnetic field, its usual, practical output is a small voltage.