Browse Definitions :
Definition

electric field strength

Electric field strength is a quantitative expression of the intensity of an electric field at a particular location. The standard unit is the volt per meter (v/m or v · m -1). A field strength of 1 v/m represents a potential difference of one volt between points separated by one meter.

Any electrically charged object produces an electric field. This field has an effect on other charged objects in the vicinity. The field strength at a particular distance from an object is directly proportional to the electric charge, in coulombs, on that object. The field strength is inversely proportional to the distance from a charged object. The field-strength-vs-distance curve is a direct inverse function, and not an inverse-square function, because electric field strength is specified in terms of a linear displacement (per meter) rather than a surface area (per meter squared).

An alternative expression for the intensity of an electric field is electric flux density. This refers to the number of lines of electric flux passing orthogonally (at right angles) through a given surface area, usually one meter squared (1 m 2). Electric flux density, like electric field strength, is directly proportional to the charge on the object. But flux density diminishes with distance according to the inverse-square law, because it is specified in terms of a surface area (per meter squared) rather than a linear displacement (per meter).

Sometimes the strength of an electromagnetic field (EM field) is specified in terms of the intensity of its electric-field component. This is done by engineers and scientists when talking about the radio-frequency field strength at a certain location arising from sources such as distant transmitters, celestial objects, high-tension utility lines, computer displays, or microwave ovens. In this context, electric field strength is usually specified in microvolts per meter (µV/m or µV · m -1), nanovolts per meter (nV/m or nV · m -1), or picovolts per meter (pV/m or pV · m -1). The relationship among these units is shown in the table.

 

Unit To convert to v/m,
multiply by:
Conversely,
multiply by:
v/m 1 1
µV/m 10 -6 10 6
nV/m 10 -9 10 9
pV/m 10 -12 10 12

 

Also see: SI (International System of Units).

This was last updated in July 2015

Continue Reading About electric field strength

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

SearchCompliance

  • Whistleblower Protection Act

    The Whistleblower Protection Act of 1989 is a law that protects federal government employees in the United States from ...

  • smart contract

    A smart contract, also known as a cryptocontract, is a computer program that directly controls the transfer of digital currencies...

  • risk map (risk heat map)

    A risk map, also known as a risk heat map, is a data visualization tool for communicating specific risks an organization faces. A...

SearchSecurity

  • Payload (computing)

    The term payload, when used in the context of networking or telecommunications, is the data carried inside of a packet (or other ...

  • access control

    Access control is a security technique that regulates who or what can view or use resources in a computing environment.

  • ethical hacker

    An ethical hacker, also referred to as a white hat hacker, is an information security expert who systematically attempts to ...

SearchHealthIT

SearchDisasterRecovery

  • virtual disaster recovery

    Virtual disaster recovery is a type of DR that typically involves replication and allows a user to fail over to virtualized ...

  • tabletop exercise (TTX)

    A tabletop exercise (TTX) is a disaster preparedness activity that takes participants through the process of dealing with a ...

  • risk mitigation

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a data center.

SearchStorage

  • storage at the edge

    Storage at the edge is the collective methods and technologies that capture and retain digital information at the periphery of ...

  • Flash Storage

    Flash storage is any type of drive, repository or system that uses flash memory to keep data for an extended period of time.

  • optical disc

    An optical disc is an electronic data storage medium that can be written to and read from using a low-powered laser beam.

Close