An ammeter should be connected in what configuration to properly measure current?

To measure current accurately in a circuit, an ammeter must be connected in series with the load. This configuration allows the ammeter to become part of the continuous path through which the electric current flows. When installed in series, the ammeter can measure the flow of electrons through the entire circuit segment it is monitoring because it experiences the same current that passes through the load.

Connecting an ammeter in parallel with the load would create a direct short circuit, which could damage the ammeter and not provide a valid current reading. Similarly, connecting it at a ground point or in a separate circuit would not allow it to measure the current flowing through the desired circuit components. Therefore, the only appropriate method for measuring current is to place the ammeter in series with the load.