1 Answer
A galvanometer is used to measure small electric currents. It's an instrument that can detect and display the presence and strength of current in a circuit. The main purpose of a galvanometer is to give a precise reading of current in the range of a few microamperes (µA) to milliamperes (mA).
Here’s how it works:
- It uses a needle or pointer that moves in response to the magnetic field created by the current flowing through a coil of wire.
- The more current passing through the coil, the greater the deflection of the needle, and this movement gives a direct indication of the current strength.
In addition to directly measuring current, a galvanometer can be used as a part of other instruments, such as voltmeters or ammeters, by adding external components like resistors or shunt resistors.
In summary, it’s used for detecting and measuring very small currents, which is especially useful in precise electrical experiments and testing circuits.
Here’s how it works:
- It uses a needle or pointer that moves in response to the magnetic field created by the current flowing through a coil of wire.
- The more current passing through the coil, the greater the deflection of the needle, and this movement gives a direct indication of the current strength.
In addition to directly measuring current, a galvanometer can be used as a part of other instruments, such as voltmeters or ammeters, by adding external components like resistors or shunt resistors.
In summary, it’s used for detecting and measuring very small currents, which is especially useful in precise electrical experiments and testing circuits.