Hall Effect Experiment Questions and Answers for Viva

Answer-1: The Hall Effect principle is named for physicist Edwin Hall. He discovered that when a conductor or semiconductor with current flowing in one direction was introduced perpendicular to a magnetic field a voltage could be measured at right angles to the current path.

Answer-2: A hole is an electric charge carrier with a positive charge, equal in magnitude but opposite in polarity to the charge on the electron.

Answer-3: The quotient of the potential difference per unit width of metal strip in the Hall Effect divided by the product of the magnetic intensity and the longitudinal current density.

Answer-4: The units of R_H are usually expressed as m³/C, or Ω ? cm / G, or other variants.

Answer-5: Hall voltage polarity is dependent upon both the polarity of the magnetic field and the direction of current through the conductor.

Answer-6: An electromagnet is a magnet that runs on electricity. Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. The poles of an electromagnet can even be reversed by reversing the flow of electricity.

Answer-7: A current probe is a device that can measure amperage without breaking a circuit. Current probes can be self contained devices, or they may be designed to work in conjunction with a multimeter.

Answer-8: The Hall Voltage is the potential created across a current-carrying metal-strip when the strip is placed in a magnetic field perpendicular to the current flow in the strip.

Answer-9: A semiconductor is a material which has electrical conductivity to a degree between that of a metal (such as copper) and that of an insulator (such as glass).

Answer-10: An electric field is a field around charged particles and changing magnetic fields which exerts a force on charges within the field.

Answer-11: A condition found in the region around a magnet or an electric current, characterized by the existence of a detectable magnetic force at every point in the region and by the existence of magnetic poles.