## A model electric train requires 6 V to operate. When connected to a 120 V household circuit, a transformer is?

Question by Keri M: A model electric train requires 6 V to operate. When connected to a 120 V household circuit, a transformer is?
needed. If the primary coil of the transformer has 240 windings, show that there should be 12 turns in the secondary coil.

Yes, everything you said is correct.

## A model electric train requires 4 V to operate. If the primary coil of its transformer has 300 windings, how m?

Question by : A model electric train requires 4 V to operate. If the primary coil of its transformer has 300 windings, how m?

A model electric train requires 4 V to operate. If the primary coil of its transformer has 240 windings, how many windings should the secondary have if the primary is connected to a 120 V household circuit?

N / 240 = 4 / 120

N = 8

That is the number of turns needed for the secondary.

## 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?