Q. What is the difference between an ammeter and a voltmeter?

Answer

Both the voltmeter and the ammeter are used in electric circuits, however, the voltmeter is used to measure voltage or emf between two locations, while an ammeter is used to measure the flow of current. If the ammeter is placed in series with the circuit being measured, so that all of the current in the circuit is traveling through it, it can be used to measure very small amounts of current and display the result in milliamperes. In order to determine the voltage, a voltmeter is connected in parallel to the power source. Connecting the negative terminal to the negative polarity and the positive terminal to the positive polarity of the supply is standard practice for both of these devices.