An ammeter must be connected in the circuit in such a way that?

An ammeter is a specific instrument designed to measure the current flowing through a circuit. To function correctly, it must be connected such that all the current flowing through the circuit also passes through the ammeter. This is essential because the ammeter provides a measurement based on the total current, ensuring that the reading is accurate and reflective of the actual current in the circuit.

When all current flows through the ammeter, it can produce a reading that is directly proportional to the current in the entire circuit. If an ammeter were connected in a configuration that did not allow all current to flow through it, the reading would not represent the total current, leading to inaccurate or misleading results.

In contrast, connections made in parallel or options that suggest disconnection or bypassing do not allow for the ammeter to accurately measure the current in the circuit, which is why those choices would not achieve the intended purpose of an ammeter.