Browse Definitions :
Definition

henry (H)

The henry (symbolized H) is the Standard International ( SI ) unit of inductance . Reduced to base SI units, one henry is the equivalent of one kilogram meter squared per second squared per ampere squared (kg ­ m 2 ­ s -2 ­ A -2 ).

In a circuit where the current is changing at a constant rate of one ampere per second (A/s), an inductance of 1 H results in the generation of one volt (1 V) of potential difference across an inductor. More rapid current changes produce much greater surges of electromotive force. This is the principle by which a spark coil generates a high and dangerous voltage.

The henry is a large unit of inductance. In audio-frequency ( AF ) and radio-frequency ( RF ) applications, units of millihenrys (mH), where 1 mH = 10 -3 H, and microhenrys (µH), where 1 µH = 10 -6 H, are common. Occasionally, the filter choke in a power supply, or a field coil designed to produce a large voltage upon release of its stored magnetic energy, will be found whose value can be expressed in henrys. In very-high-frequency ( VHF ), ultra-high-frequency ( UHF ), and microwave devices and systems, units of nanohenrys (nH), where 1 nH = 10 -9 H, and picohenrys (pH), where 1 pH = 10 -12 H, are used.

Also see capacitor , inductor , reactance , and farad .

This was last updated in March 2011
SearchNetworking
  • network packet

    A network packet is a basic unit of data that's grouped together and transferred over a computer network, typically a ...

  • virtual network functions (VNFs)

    Virtual network functions (VNFs) are virtualized tasks formerly carried out by proprietary, dedicated hardware.

  • network functions virtualization (NFV)

    Network functions virtualization (NFV) is a network architecture model designed to virtualize network services that have ...

SearchSecurity
  • Domain-based Message Authentication, Reporting and Conformance (DMARC)

    The Domain-based Message Authentication, Reporting and Conformance (DMARC) protocol is one leg of the tripod of internet ...

  • data breach

    A data breach is a cyber attack in which sensitive, confidential or otherwise protected data has been accessed or disclosed in an...

  • insider threat

    An insider threat is a category of risk posed by those who have access to an organization's physical or digital assets.

SearchCIO
  • data privacy (information privacy)

    Data privacy, also called information privacy, is an aspect of data protection that addresses the proper storage, access, ...

  • leadership skills

    Leadership skills are the strengths and abilities individuals demonstrate that help to oversee processes, guide initiatives and ...

  • data governance policy

    A data governance policy is a documented set of guidelines for ensuring that an organization's data and information assets are ...

SearchHRSoftware
SearchCustomerExperience
  • recommerce

    Recommerce is the selling of previously owned items through online marketplaces to buyers who reuse, recycle or resell them.

  • implementation

    Implementation is the execution or practice of a plan, a method or any design, idea, model, specification, standard or policy for...

  • first call resolution (FCR)

    First call resolution (FCR) is when customer service agents properly address a customer's needs the first time they call.

Close