What is the Difference Between Galvanometer and Ammeter?

The main difference between a galvanometer and an ammeter lies in their ability to measure and display the current. Here are the key differences between the two:

• Function: An ammeter is a measuring device used to measure the strength of the electric current, while a galvanometer is an electromechanical instrument used to detect the strength and direction of the current.
• Magnitude and Direction: An ammeter measures only the magnitude of the current, while a galvanometer shows both the direction and magnitude of the current.
• Current Type: A galvanometer can only be used to measure direct current (DC), whereas an ammeter can measure both alternating and direct current.
• Sensitivity and Accuracy: A galvanometer is more sensitive than an ammeter but less accurate.
• Application: Galvanometers are used in bridges and potentiometers, while ammeters are used in electrical circuits.
• Mechanical or Electronic: A galvanometer is a mechanical device, while an ammeter can be either mechanical or electronic.

In summary, a galvanometer is a more sensitive device that measures both the magnitude and direction of the current, while an ammeter is less sensitive and measures only the magnitude of the current. Both devices are used to measure electric current, but they have different applications and levels of sensitivity.

Comparative Table: Galvanometer vs Ammeter

Here is a table comparing the differences between a galvanometer and an ammeter:

In summary, a galvanometer is a more sensitive and accurate instrument that measures both the direction and magnitude of the current, while an ammeter is less sensitive and measures only the magnitude of the current. A galvanometer can be converted into an ammeter by connecting a low resistance (shunt resistance) in parallel with the galvanometer.