Browse Definitions :
Definition

farad (F)

The farad (symbolized F) is the standard unit of capacitance in the International System of Units (SI). Reduced to base SI units, one farad is the equivalent of one second to the fourth power ampere squared per kilogram per meter squared (s4 · A2 · kg-1 · m-2).

When the voltage across a 1 F capacitor changes at a rate of one volt per second (1 V/s), a current flow of 1 A results. A capacitance of 1 F produces 1 V of potential difference for an electric charge of one coulomb (1 C). The farad is an extremely large unit of capacitance. In practice, capacitors with values this large are almost never seen.

In common electrical and electronic circuits, units of microfarads (µF), where 1 µF = 10-6 F, and picofarads (pF), where 1 pF = 10-12 F, are used. At radio frequencies (RF), capacitances range from about 1 pF to 1,000 pF in tuned circuits, and from about 0.001 µF to 0.1 µF for blocking and bypassing. At audio frequencies (AF), capacitances range from about 0.1 µF to 100 µF. In power-supply filters, capacitances can be as high as 10,000 µF.

Both the farad and Faraday's constant are symbolized by the capital letter F; however they are different. Faraday's constant is a measure of the amount of electrical charge in a single mole.

Also see: faraday, capacitor, inductor, reactance, and henry.

This was last updated in January 2015

Continue Reading About farad (F)

Join the conversation

2 comments

Send me notifications when other members comment.

Please create a username to comment.

Capacitors of one Farad and more are now readily available, and more applications for these large values are growing.
Cancel
In English-Opposit charges attract - even in metals like copper. Two conductors with different polarity separated by an insulator so they can not short circuit or equalize voltage difference form a capacitor.
The opposite charges, like north and south pole magnets, start attracting each other and accumulate or bunch where the opposite charges or wires cross.
When wanted, this capacitance helps smooth out the flow of electricity or will store a charge. Example changing 120 V 60Hz AC to smooth 2.3 v DC.
When not wanted parasitic capacitance interferes with the circuit. Static shock is one example.
Capacitance is also used as a way to measure fuel in a fuel tank with no moving parts.
Cancel

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • risk management

    Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings.

  • compliance as a service (CaaS)

    Compliance as a Service (CaaS) is a cloud service service level agreement (SLA) that specified how a managed service provider (...

  • data protection impact assessment (DPIA)

    A data protection impact assessment (DPIA) is a process designed to help organizations determine how data processing systems, ...

SearchSecurity

  • quantum key distribution (QKD)

    Quantum key distribution (QKD) is a secure communication method for exchanging encryption keys only known between shared parties.

  • identity theft

    Identity theft, also known as identity fraud, is a crime in which an imposter obtains key pieces of personally identifiable ...

  • cybercrime

    Cybercrime is any criminal activity that involves a computer, networked device or a network.

SearchHealthIT

SearchDisasterRecovery

  • disaster recovery plan (DRP)

    A disaster recovery plan (DRP) is a documented, structured approach that describes how an organization can quickly resume work ...

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • disaster recovery team

    A disaster recovery team is a group of individuals focused on planning, implementing, maintaining, auditing and testing an ...

SearchStorage

  • logical unit number (LUN)

    A logical unit number (LUN) is a unique identifier for designating an individual or collection of physical or virtual storage ...

  • NVMe over Fabrics (NVMe-oF)

    NVMe over Fabrics, also known as NVMe-oF and non-volatile memory express over fabrics, is a protocol specification designed to ...

  • CIFS (Common Internet File System)

    CIFS (Common Internet File System) is a protocol that gained popularity around the year 2000, as vendors worked to establish an ...

Close