Which method is used to measure current in a circuit?

The method used to measure current in a circuit is to use an ammeter connected in series with the circuit. This connection allows the ammeter to measure the flow of electric charge, or current, as it has to pass through the ammeter to complete the circuit.

When the ammeter is placed in series, it experiences the same current flowing through that part of the circuit, ensuring an accurate measurement. This is crucial because current is defined as the flow of charge, and measuring it requires that all of the charge passes through the measuring instrument.

In contrast, connecting an ammeter in parallel would not yield an accurate current measurement because it would create a short circuit, effectively bypassing the load. Using a voltmeter across the circuit would measure voltage, not current. A clamp meter, while useful, typically provides a non-invasive way to measure current without needing to disconnect the circuit, and it operates based on magnetic fields rather than directly measuring current flow as an ammeter does in series.