capacitance

/kə'pæsitəns/
Học thuật
Thân thiện
Definition
  1. Noun:
    • An electrical device characterized by its capacity to store an electric charge: A component, typically a capacitor, designed to hold electrical energy in an electrostatic field.
    • An electrical phenomenon whereby an electric charge is stored: The physical property of a system that allows it to store an electric charge when a voltage difference is applied across it.
Usage
  • As a property (phenomenon): "Capacitance" is a fundamental electrical property measured in farads (F). It describes how much charge a system can store per unit of voltage.
  • As a component specification: The term specifies the storage capability of a capacitor, an electrical device.
Examples
  • Describing a property:
    • The capacitance of the parallel plates increases with a larger surface area.
    • Understanding the circuit's total capacitance is crucial for its design.
  • Referring to a device's characteristic:
    • This capacitor has a capacitance of 10 microfarads.
    • Check the component's rated capacitance before installing it.
Advanced Usage
  • "Parasitic capacitance": Unwanted or stray capacitance that exists between conductors in a circuit, often affecting high-frequency performance.
    • Parasitic capacitance can cause signal delays in the microprocessor.
  • "Capacitance coupling": A method of transferring energy between circuits using the capacitive effect.
    • The signal was transmitted through capacitance coupling.
Variants and Related Words
  • Capacitor (n): The physical electrical device that provides capacitance.
    • He replaced the faulty capacitor on the circuit board.
  • Capacitive (adj): Relating to or characterized by capacitance.
    • The touchscreen uses a capacitive sensing technology.
Synonyms
  • Charge storage capacity (descriptive synonym for the phenomenon).
  • Capacitive reactance is a related but distinct concept (the opposition to alternating current due to capacitance).
Related Phrases and Technical Terms
  • "Capacitance to ground": The capacitance between a conductor and the earth or a ground plane.
    • The long wire had significant capacitance to ground, affecting the signal.
  • "Self-capacitance": The capacitance of an isolated, conductive object relative to its surroundings.
    • The antenna's performance depends on its self-capacitance.
Noun
  1. an electrical device characterized by its capacity to store an electric charge
  2. an electrical phenomenon whereby an electric charge is stored

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