Prisijunkite
Physics for IGCSE & O level - Electricity (Section 6 - No. 6)
What is the frequency of the mains electricity in the United States?
50 Hz
60 Hz
110 V
230 V
Paaiškinimas
The frequency of mains electricity in the US is 60 Hz.
Komentarai (0)
Prisijungti Norėdami komentuoti
Skelbimas
Leiskite javascript tinkamai įkelti šį puslapį