What is Hall Effect

When a current carrying conductor when placed at right angles to the magnetic field, a difference develops between the opposite edges of the conductor at right angles to both the magnetic field and the conductor. This is termed as HALL EFFECT

Although in metals, the potential difference developed due to hall effect is too small to be measured even with a highly sensitive moving coil voltmeter, the potential difference is of considerable magnitude in semi conductors especially Germanium.

Some magnetic measuring instruments have their operation based on Hall Effect. Thus flux and flux density are measured by means of probes in some instruments, using this principle. Such instruments find extensive use in exploration of magnetic fields in confined regions