When measuring current, in what way must the ammeter be connected to the circuit?

An ammeter must be connected in series with the circuit to accurately measure the current flowing through that circuit. This is essential because an ammeter is designed to measure the total current passing through it, which can only be done when it is placed in line with the flow of electrons.

When connected in series, the ammeter experiences the same current that flows through the rest of the circuit. This allows it to provide a precise reading of the current value. If the ammeter were to be connected in parallel, it would create an alternate path for the current, potentially causing an incorrect measurement and possibly damaging the ammeter due to the high current that could pass through it.

Connections such as an open or short connection are not appropriate for ammeters as they do not allow for proper current measurement. An open connection would interrupt the flow of electricity and result in no reading, while a short connection would bypass the circuit entirely, leading to erroneous measurements and unsafe conditions.