Final answer:
A clamp-on or clamp-around ammeter is used to measure current without disconnecting any wires. It works by clamping around one of the wires in the circuit and measuring the magnetic field generated by the current to calculate the amperage.
Step-by-step explanation:
An ammeter is used to measure current in a circuit. To get an amperage reading, a clamp-on or clamp-around ammeter can be used. These types of ammeters are designed to measure current without disconnecting any wires. To take an amperage reading with a clamp-on or clamp-around ammeter, the ammeter is clamped around one of the wires in the circuit.
The ammeter measures the magnetic field generated by the current in the wire, which allows it to calculate the amperage. For example, if you want to measure the current flowing through a power cord, you would clamp the ammeter around one of the wires in the cord and read the amperage value displayed on the ammeter.