How is ammeter connected to galvanometer?
2 Answers
An ammeter is typically connected to a galvanometer by using a shunt resistor. The galvanometer is sensitive and can measure small currents, while the ammeter is designed to measure larger currents.
Here's how they are connected:
1. **Shunt Resistor**: A low-resistance shunt is placed in parallel with the galvanometer. This allows most of the current to bypass the galvanometer, protecting it from damage and allowing it to measure larger currents.
2. **Connection**: The galvanometer is connected in series with the shunt resistor, which is then connected in parallel to the input terminals of the ammeter.
3. **Calibration**: The ammeter is calibrated to account for the portion of current that flows through the galvanometer and the shunt, ensuring accurate readings.
This setup allows the galvanometer to function as a component of the ammeter while extending its range to measure higher currents.
Here's how they are connected:
1. **Shunt Resistor**: A low-resistance shunt is placed in parallel with the galvanometer. This allows most of the current to bypass the galvanometer, protecting it from damage and allowing it to measure larger currents.
2. **Connection**: The galvanometer is connected in series with the shunt resistor, which is then connected in parallel to the input terminals of the ammeter.
3. **Calibration**: The ammeter is calibrated to account for the portion of current that flows through the galvanometer and the shunt, ensuring accurate readings.
This setup allows the galvanometer to function as a component of the ammeter while extending its range to measure higher currents.