farad

/'færəd/

Thân thiện

A scientist writes the unit "farad" on a whiteboard next to a capacitor diagram.

Definition

1. Noun:
   • The SI unit of electrical capacitance: A farad is the standard unit used to measure capacitance, which is the ability of a capacitor to store an electrical charge. It is defined as the capacitance of a capacitor that, when charged with one coulomb of electricity, has a potential difference of one volt between its plates.

Usage Examples

• Noun:
  • A typical capacitor in an electronic circuit might have a capacitance of a few microfarads.
  • The farad is a very large unit; most practical capacitors are rated in microfarads (µF) or picofarads (pF).
  • One farad represents a very large amount of capacitance.

Advanced Usage

• "in farads": Used to specify a measurement of capacitance.
  • The capacitor's value is expressed in farads.
• "farad per meter" (F/m): A derived unit for permittivity, a related electrical property.
  • The permittivity of free space is approximately 8.854 × 10⁻¹² farads per meter.

Variants and Related Words

• Microfarad (µF) (n): A unit equal to one millionth (10⁻⁶) of a farad.
  • This electrolytic capacitor is 1000 microfarads.
• Picofarad (pF) (n): A unit equal to one trillionth (10⁻¹²) of a farad.
  • The tuning capacitor has a range from 10 to 100 picofarads.
• Nanofarad (nF) (n): A unit equal to one billionth (10⁻⁹) of a farad.
• Capacitance (n): The electrical property that the farad measures.
  • Capacitance is measured in farads.

Synonyms

• F (abbreviation): The standard symbol for the farad.
  • The capacitor is labeled 0.1 F.

Related Phrases and Contexts

• "farad is the SI unit of capacitance": A common phrase defining the term in technical contexts.
• "rated in farads": Describes how a capacitor's storage capacity is specified.

Học thuật

Noun

1. the capacitance of a capacitor that has an equal and opposite charge of 1 coulomb on each plate and a voltage difference of 1 volt between the plates

Từ đồng nghĩa

• f