Difference Between Galvanometer and Ammeter – Understanding the Basics
If you are someone who is interested in electrical measurements, then the terms “galvanometer” and “ammeter” may already be familiar to you. However, if you are new to this field, then it can be confusing to differentiate between these two instruments. To clear up the confusion, let’s dive into the details and understand the basic differences between a galvanometer and an ammeter.
Galvanometer
A galvanometer is a device commonly used to detect and measure small electric currents. It consists of a coil of wire suspended between two magnetic poles, and when a current is passed through the coil, it experiences a force that causes it to move. The movement of the coil is then translated into a reading on a scale, which provides information about the magnitude and direction of the current.
Galvanometers are typically used in scientific experiments and in electrical circuit analysis, where the measurement of small currents is essential. They are also used in many industrial applications, such as in the control of motor speed and in the monitoring of machine parts.
Ammeter
An ammeter, on the other hand, is a device that measures the flow of electric current through a circuit. It is typically connected in series with the circuit, meaning that the current flowing through the circuit also flows through the ammeter.
Unlike a galvanometer, which is designed to detect and measure small currents, an ammeter is capable of measuring large currents. This makes it an essential tool in many industries, including automotive and aerospace, where large currents are used to power engines and other machinery.
The Main Differences
While the basic workings of a galvanometer and an ammeter may be similar, there are some key differences that set them apart. Firstly, a galvanometer is designed to measure small currents, whereas an ammeter can measure both small and large currents.
Secondly, a galvanometer is primarily used for detection and analysis purposes, whereas an ammeter is used for measurement and monitoring purposes. This means that galvanometers are typically used in scientific experiments and research, while ammeters are used in industrial and commercial applications.
Finally, the cost of a galvanometer is typically much lower than that of an ammeter, due to the fact that it is a simpler device that is designed for a narrower range of applications. In contrast, an ammeter is a more complex device that is designed for a much wider range of applications, and as such, it is typically more expensive.
Conclusion
In summary, while both a galvanometer and an ammeter are used to measure electric current, they are designed for different purposes and have different capabilities. Understanding the differences between these two devices is essential for anyone who works with electrical currents, as it can help to ensure that the correct instrument is selected for a given application.
Table difference between galvanometer and ammeter
| Galvanometer | Ammeter |
|---|---|
| It is a device used to measure small electric currents. | It is a device used to measure larger electric currents. |
| It can only measure the direction of current flow. | It can measure the magnitude and direction of current flow. |
| It has a low resistance. | It has a high resistance. |
| It is used in the construction of ammeters, voltmeters, and other measuring instruments. | It is used to measure current in a circuit and is usually connected in series with the load. |
| It is very sensitive and can detect very small currents. | It is less sensitive than a galvanometer and can only measure larger currents. |