Question

Is Hall voltage positive or negative?

Answer 1

The sign of the Hall voltage depends on the type of charge carriers in the material:  

1. Positive Hall voltage → If the charge carriers are holes (as in p-type semiconductors), the Hall voltage is positive.
   

1. Negative Hall voltage → If the charge carriers are electrons (as in n-type semiconductors or most metals), the Hall voltage is negative.
   

In simple terms, the direction of the Hall voltage is determined by the right-hand rule (for conventional current) or left-hand rule (for electron flow) and depends on the type of charge carriers present.