True: Transformers can step up and step down voltage, A step up has more turns on the second coil, Transformers require AC input, Transformers use an iron core, Plastic is a good insulator , False: Transformers can only step up voltage, Transformers are 100% efficient, Transformers require DC input, Transformers use a steel core, Loud speakers use the generator effect,

Leaderboard

Visual style

Mga Option

I-switch ang template

I-restore ang gi-autosave: ?