A model electric train requires 12 V to operate. If the primary coil of its transformer has 300 windings, how?

Question by baby: A model electric train requires 12 V to operate. If the primary coil of its transformer has 300 windings, how?
please explain!!!!!!

A model electric train requires 12 V to operate. If the primary coil of its transformer has 300 windings, how many windings should the secondary have if the primary is connected to a 120 V household circuit?

Best answer:

Answer by Ryan
30. Turns and voltage are proportional, so if you want to step down voltage by a factor of ten, you step wraps down by a factor of ten.

What do you think? Answer below!