## Posts Tagged ‘order’

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

Saturday, June 30th, 2012

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?

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

### A transformer is used to convert 120 V to 8.6 V in order to power a toy electric train. If there are 260 turns

Monday, February 6th, 2012

Question by Australianhotti: A transformer is used to convert 120 V to 8.6 V in order to power a toy electric train. If there are 260 turns
A transformer is used to convert 120 V to 8.6 V in order to power a toy electric train. If there are 260 turns in the primary, how many turns should there be in the secondary?

The voltage ratio is the same as the turns ratio. So the easiest solution is:
120/8.6 = 260/X whoops I got the X on the bottom, no problem
8.6/120 = X/260 and X = 8.6*260/120
= 18.63 turns
actually you would probably put 19 turns as a practical matter.

### what is the usual consist order for an ho scale work train on a regular model railroaders layout?

Thursday, April 21st, 2011

Question by Zachary: what is the usual consist order for an ho scale work train on a regular model railroaders layout?
I’m looking to get the necessary cars, but i don’t know the usual consist for a real work train.