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Kirchhoff's Law
f-alpha.net » Physics » Electricity » Measuring Current-Voltage » Get Started... » The Multimeter

The Multimeter

A distinction is made between digital and analog multimeters...

  • With digital multimeters the measured value is displayed as a numerical value using an analog-digital converter.
  • With analog multimeters the measured value is displayed on a moving coil meter.

Using a rotary switch you are able to select between several measured values and measurement ranges...

Circuit symbol ammeter.

Circuit symbol voltmeter.

Circuit symbol ohmmeter.

  • An ammeter measures the electric current in Ampere [A] and displays a positive reading when the current flows from the positive (+) to the negative (−) terminal.
  • A voltmeter measures the voltage in Volt [V] and displays a positive reading when the electric potential at the positive (+) terminal is higher than at the negative (−) terminal.
  • An ohmmeter measures the electric resistance in Ohm [Ω] and always shows a positive reading.

An analog multimeter. (Enlarge)

A digital multimeter. (Enlarge)

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