Here's a breakdown:

* Electric current is the flow of electric charge.

* Ammeter is a device specifically designed to measure the rate of flow of electric charge, which is the current.

* Ampere (A) is the unit of measurement for electric current.

Think of it like this:

* Water flowing through a pipe: The amount of water flowing through the pipe is analogous to electric current.

* Flow meter: An ammeter is like a flow meter that measures how much water flows through the pipe per unit time.

To measure current, you typically connect the ammeter in series with the circuit. This means that the current flowing through the circuit also flows through the ammeter, allowing it to measure the current strength.