Can a hot-wire ammeter be used to measure a direct current having a constant value? Do we have to change the graduation?

Hot wire ammeters are used for measuring

Hot wire ammeters are used for measuring

Hot wire ammeters are used for measuring

Hot wire ammeters can measure :

Can we use galvanometer to measure alternating current ?

A dc ammeter and a hot wire ammeter are connected to a circuit in series. When a direct current is passed through circuit, the dc ammeter shows 6 A. When ac current flows through circuit, the ac ammeter shows 8A. What will be reading of each ammeter if dc and ac current flow simulataneously through the circuit?