Question

The presence and direction of flow of current is detected by a device called ………. (ammeter/ galvanometer).

Answer 1

1. The ammeter is used to measure the magnitude of current through a circuit.
2. A galvanometer can detect the presence of current.
3. The deflection on the galvanometer indicates the direction of the current in that circuit.
4. Thus, the instrument that can detect the direction of flow of current is a galvanometer.

Hence the answer is Galvanometer.