Answer:
A voltmeter measures the potential difference (or voltage) across a circuit element.
An ammeter measures the electric current across a circuit element.
Explanation:
This because a voltmeter is an electric device use to measure voltage or potential difference in a circuit. It is connected parallel to a device in the circuit. voltage is measure in volts.
An ammeter is an electric device that is use to measure currents in a circuit even to the smallest part of current. Current is measure in Ampere and ammeter is connected in direct series to a device in a circuit.