volt

/voult/

Thân thiện

A student measures the voltage of a battery with a multimeter.

Definition

1. Noun:
   • A unit of electrical potential difference (voltage): The volt is the standard unit of measurement for electromotive force or electrical potential difference. It is defined as the potential difference across a conductor when a current of one ampere dissipates one watt of power. One volt is also equivalent to the potential difference across a resistance of one ohm when one ampere of current flows through it.

Examples of Usage

• Noun:
  • A standard household battery provides 1.5 volts.
  • The power outlet supplies electricity at 120 volts in many countries.
  • The potential difference across the component was measured at 12 volts.

Advanced Usage

• "Volt-ampere (VA)": A unit of apparent power in an electrical circuit, equal to the product of root-mean-square (RMS) voltage and current.
  • The transformer is rated for 500 volt-amperes.
• "Volt-second": A unit of magnetic flux, equivalent to the weber.
  • The change in magnetic flux was measured in volt-seconds.

Variants and Related Words

• Voltage (n): The electromotive force or potential difference expressed in volts.
  • High voltage lines carry electricity over long distances.
• Voltmeter (n): An instrument used for measuring electrical potential difference in volts.
  • The technician used a voltmeter to check the circuit.

Synonyms

• Potential difference: The difference in electric potential between two points.
• Electromotive force (EMF): The voltage generated by a source of electrical energy.

Related Phrases and Compounds

• Kilovolt (kV): A unit equal to one thousand volts.
  • The transmission line operates at 500 kilovolts.
• Millivolt (mV): A unit equal to one thousandth of a volt.
  • The sensor outputs a signal in the millivolt range.
• Microvolt (µV): A unit equal to one millionth of a volt.
  • The amplifier can detect signals as small as a few microvolts.

Học thuật

Noun

1. a unit of potential equal to the potential difference between two points on a conductor carrying a current of 1 ampere when the power dissipated between the two points is 1 watt; equivalent to the potential difference across a resistance of 1 ohm when 1 ampere of current flows through it

Từ đồng nghĩa

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