A transformer is used to convert 120 V to 15.7 V in order to power a toy electric train.?

Question by : A transformer is used to convert 120 V to 15.7 V in order to power a toy electric train.?
If there are 214 turns in the primary, how many turns should there be in the secondary?

Best answer:

Answer by Mohasa
use V1/V2 = n1/n2

where V1 = 120 V, V2 = 15.7 V, and n1 = 214 turns

so n2 = n1 V2/V1

…… = 214*15.7/120

n2 = 28 turns, number of turns in the secondary

Hope this helps

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