When measuring this effect, a namesake (*) probe is calibrated using a known magnetic field strength.
This effect can be used to calculate the number of free electrons in a wire by measuring the drift velocity. A quantum version of this effect was discovered by Klaus von Klitzing. When measuring this effect, a namesake (*) probe is calibrated using a known magnetic field strength. This effect can distinguish between negative charges moving in one direction and positive charges moving in the other, because the voltage differences will be opposite in magnitude. For 10 points, name this effect in which an applied magnetic field causes a voltage difference.
This effect can be used to calculate the number of free electrons in a wire by measuring the drift velocity.
{Hall} effect