Home
Topics
Networking
Smart grid
picofarad per meter (pF/m)

Definition

picofarad per meter (pF/m)

Part of the Smart grid glossary:

The picofarad per meter (symbolized pF/m) is a unit of electric permittivity , a constant of proportionality that exists between electric displacement and electric field intensity.

Next Steps

Table of Physical Units
Cheat sheet quick look-up for the table of phys...
(WhatIs.com)
farad (F)
The farad (symbolized F) is the standard unit o...
(SearchCIO-Midmarket.com)

Permittivity is a characteristic of matter , and is important in the design and construction of capacitor s and radio-frequency ( RF ) transmission lines. The permittivity of a vacuum (also known as free space) is equal to approximately 8.85 pF/m.

Relative permittivity can be expressed as the ratio of the number of picofarads per meter in a particular substance to 8.85 pF/m. This ratio is called the dielectric constant of a material. Free space has a dielectric constant of 1, and most substances have a dielectric constant greater than this.

Also see capacitance , permittivity , SI , and Table of Physical Units and Constants.

This was last updated in March 2011

Posted by: Margaret Rouse

Related Terms

Definitions

farad (F)
- The farad (symbolized F) is the standard unit of capacitance in the International System of Units (SI). (SearchCIO-Midmarket.com)

Glossaries

Smart grid
- Terms related to smart grids, including definitions about utility electricity delivery systems and words and phrases about smart meters and distributing, monitoring and billing electrical power.
Internet applications
- This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Dig Deeper

Fast References

Table of Physical Units

People Who Read This Also Read...

Ask a Question. Find an Answer.Powered by ITKnowledgeExchange.com

Ask An IT Question

Get answers from your peers on your most technical challenges

Tech TalkComment

Share

Comments

Results

Contribute to the conversation

All fields are required. Comments will appear at the bottom of the article.

Back to top

More from Related TechTarget Sites

( View All TechTarget Sites )

Data Center
Networking
VMware
Exchange
Security
Virtual Desktop
SDN
Solid State Storage

Data Center

( Find Out More About This Site )
- Bloom Energy Server (Bloom box)
  
  A Bloom box, officially known as an Energy Server, is a modular construction of fuel cells that can be used in combination to produce the amount of energy required for a given application. Each fuel cell, which consists of a metal alloy plate sandwiched between two ceramic layers, generates 25 watts of power. A single fuel cell can power a light bulb; a stack about the size of a loaf of bread could power the average home.
- Opscode Chef
  
  Chef is an open-source systems management and cloud infrastructure automation framework created by Opscode. Devops can use Chef to deploy and manage servers and applications in-house and in the cloud.
- Zabbix
  
  Zabbix is an open-source tool designed to monitor networks, servers, appliances and other hardware through a Linux-based server, which communicates to the native agents that are available for many operating systems, including Linux, UNIX and Windows.
Networking

( Find Out More About This Site )
- 10 gigabit Ethernet (10 GbE)
  
  10 gigabit Ethernet is a telecommunication technology that offers data speeds up to 10 billion bits per second. It differs from traditional Ethernet in that it is a full-duplex protocol and does not require Carrier Sense Multiple Access/Collision Detection (CSMA/CD).
- network tap
  
  A network tap is an external monitoring device that mirrors the traffic that passes between two network nodes. A tap (test access point) is a hardware device inserted at a specific point in the network to monitor data.
- ISSU (in-service software upgrade)
  
  An ISSU (in-service software upgrade) is a technique for updating software on a network device without taking that device offline and thereby disrupting network services.
VMware

( Find Out More About This Site )
- nested VM (nested virtual machine)
  
  A nested VM (nested virtual machine) is a virtual machine contained within another VM.
- bubble network
  
  A bubble network is a series of interconnected virtual machines (VMs) that communicate through a virtual network switch (vSwitch) and remain isolated from the physical network.
- vNUMA (virtual NUMA)
  
  vNUMA (virtual NUMA) is a memory-access optimization method for VMware virtual machines (VMs) that helps prevent memory-bandwidth bottlenecks.
Exchange

( Find Out More About This Site )
- Microsoft Exchange Transport Dumpster
  
  The Exchange Transport Dumpster is a feature that exists in Exchange 2007 and 2010 to prevent data loss.
- Microsoft Outlook 2013
  
  Microsoft Outlook 2013 is the email client that was included in the Office 2013 suite release.
- Microsoft Exchange 2013 Poison Message Queue
  
  Microsoft Exchange 2013 Poison Message Queue is a queue that exists specifically to hold messages deemed harmful to the deployment after a transport server or service failure.
Security

( Find Out More About This Site )
- distributed denial-of-service attack (DDoS)
  
  On the Internet, a distributed denial-of-service (DDoS) attack is one in which a multitude of compromised systems attack a single target, thereby causing denial of service for users of the targeted system.
- Federal Information Security Management Act (FISMA)
  
  The Federal Information Security Management Act (FISMA) is United States legislation that defines a comprehensive framework to protect government information, operations and assets against natural or man-made threats.
- computer forensics (cyber forensics)
  
  Computer forensics is the application of investigation and analysis techniques to gather and preserve evidence from a particular computing device in a way that is suitable for presentation in a court of law.
Virtual Desktop

( Find Out More About This Site )
- desktop as a service (DaaS)
  
  Desktop as a service (DaaS), also called virtual desktop or hosted desktop, is the outsourcing of a virtual desktop infrastructure (VDI) to a third party service provider.
- virtual GPU (vGPU)
  
  A virtual GPU is a computer processor that renders graphics on a server rather than on a physical endpoint device.
- virtual desktop pool
  
  A virtual desktop pool is a group of virtual desktops that are hosted on identically configured virtual machines.
SDN

( Find Out More About This Site )
- programmable network (PN)
  
  A programmable network is one in which the behavior of network devices and flow control is handled by software that operates independently from network hardware.
- NetScaler (SDX)
  
  Citrix NetScaler SDX is a service delivery networking platform for enterprise and cloud datacenters. NetScaler SDX supports multiple NetScaler instances on a single hardware appliance.
- NX-OS
  
  NX-OS evolved from the Cisco MDS operating system, SAN-OS.
Solid State Storage

( Find Out More About This Site )
- semiconductor fab
  
  A semiconductor fab is a manufacturing plant in which raw silicon wafers are turned into integrated circuits.
- tier 0
  
  Tier 0 (tier zero) is a level of storage that’s faster, and perhaps more expensive, than any other level in the storage hierarchy.
- enterprise MLC (eMLC)
  
  Enterprise MLC (eMLC) is a type of MLC flash that has been enhanced to accommodate more write cycles than consumer-grade MLC flash offers.

All Rights Reserved,Copyright 1999 - 2013, TechTarget