An ammeter is connected in a circuit in series as the current flowing in series is always the same.
The ammeter is used for measuring a small amount of current and the result is displayed in milliamperes when it is kept in series with the circuit to be measured so that the entire current in the circuit is passing through it.
- The principle of ammeter is that the resistance and inductive reactance must be very low.
- Ammeter aims at measuring the current in the circuit, hence it is connected in series so that the same current that is there in the circuit flows through it and gets measured. In a series connection, the current flowing through all the components of the circuit remains the same.
- Ammeter has low resistance because we do not want to change the currency that is flowing through the circuit.