Browse Definitions :
Definition

Hall effect

The Hall effect is the movement of charge carriers through a conductor towards a magnetic attraction. The phenomenon is named for Edwin Hall, who discovered the effect in 1879.

The Hall effect causes a measurable voltage differential across the conductor such that one side is positively charged and the other negatively. The effect is manipulated and measured in the functioning of many electronic devices including joystick-like controls, compasses in smartphones, magnetometers, sensors and current-measuring devices. On a large scale, the effect is harnessed in Hall effect thrusters (HET) that launch some crafts into space. In the natural world, the Hall effect plays a role in gravitational collapses that result in the formation of protostars.

electrons normally travel in a straight line. The Hall effect occurs with the production of a transverse force (Lorentz force) on the charge carriers moving through a conductor, such that they actively conduct a current in the presence of a perpendicular magnetic field. The magnet's north pole pulls the negative charge carriers (typically electrons) to the side of the conductor nearest the magnet. With all the flowing electrons of the carried current on one side of the conductor, that side is negatively charged and the other side is positively charged.

In a semiconductor, the effect is even greater as they have moving positive charge carriers, which are known as Halls. Halls are atoms that are positively charged, having lost one of their electrons. The positive charge carriers flow on the side of the semiconductor nearest the magnetic south pole, influencing the negative charge carriers on the side nearest the north pole. Both carriers are repelled by their opposing magnetic force.

This was last updated in March 2018

Continue Reading About Hall effect

SearchNetworking
SearchSecurity
  • Patch Tuesday

    Patch Tuesday is the unofficial name of Microsoft's monthly scheduled release of security fixes for the Windows operating system ...

  • parameter tampering

    Parameter tampering is a type of web-based cyber attack in which certain parameters in a URL are changed without a user's ...

  • SYN flood attack

    A SYN flood attack is a type of denial-of-service (DoS) attack on a computer server.

SearchCIO
  • Lean Six Sigma

    Lean Six Sigma is a data-driven approach to improving efficiency, customer satisfaction and profits.

  • change management

    Change management is a systematic approach to dealing with the transition or transformation of an organization's goals, processes...

  • business transformation

    Business transformation is a term used to describe what happens when a company makes fundamental changes to how it operates.

SearchHRSoftware
SearchCustomerExperience
  • clickstream data (clickstream analytics)

    Clickstream data and clickstream analytics are the processes involved in collecting, analyzing and reporting aggregate data about...

  • neuromarketing

    Neuromarketing is the study of how people's brains respond to advertising and other brand-related messages by scientifically ...

  • contextual marketing

    Contextual marketing is an online marketing strategy model in which people are served with targeted advertising based on their ...

Close