Voltmeter&Ammeter

Voltmeters and Ammeters

Voltmeters and ammeters are used to measure voltage and current, respectively.

Key Points

  • A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit.
  • An ammeter is a measuring device used to measure the electric current in a circuit.
  • A voltmeter is connected in parallel with a device to measure its voltage, while an ammeter is connected in series with a device to measure its current.
  • At the heart of most analog meters is a galvanometer, an instrument that measures current flow using the movement, or deflection, of a needle. The needle deflection is produced by a magnetic force acting on a current-carrying wire.

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