Galvanometer vs Voltmeter

Galvanometer and voltmeter are measuring the device which is often used to evaluate the electric circuit. The main comparison between galvanometer and voltmeter is that a galvanometer is a type of device which has parts that move in response to an electric current, while in a voltmeter is a device that is used to measure the potential difference between two points in a circuit.

What is Galvanometer?


As we know, the Galvanometer is a particular type of analogue using induction in a coil to deflect a needle against the resistance of a spring. They were often used as one component in building wider range ammeters and voltmeter.

What is Voltmeter?


A voltmeter is also known as the voltage meter. It is an instrument that measures the voltage or potential difference in voltage known as the voltmeter. As we know, The voltmeter is always connected in parallel with the circuit. Some voltmeter is intended for the direct current called as a DC circuit and other designed for alternating current called the AC circuit.
This the instrument used to measure electric potential difference or EMF between two points in an electric circuit.

Difference between Galvanometer and voltmeter:

  • A galvanometer is an instrument used to detect the flow of current in the circuit, while in voltmeter is in the instrument used to show the amount of potential difference across two points in the circuit.
  • A galvanometer tells the direction of current in the circuit, Voltmeter tells nothing about current in the circuit.
  • A galvanometer connected series in the circuit, voltmeter connected parallel in the circuit.
  • A galvanometer is a moderate resistance, While in ideal voltmeter should have infinite resistance hence the resistance of a voltmeter is very high.
  • The magnetic field is required for a Galvanometer work, Voltmeter can work with or without a magnetic field.
  • A galvanometer measure only direct current, Voltmeter tells nothing about current in the circuit.
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