# Transformer secondary

Discussion in 'Homework Help' started by bwd111, Aug 15, 2013.

1. ### bwd111 Thread Starter Member

Jul 24, 2013
117
1
Also could some one go over this calc and why I got this answer wrong as well. 120 v ac primary and turns ration of 5:1 what is secondary voltage. my answer is 600 vac. I multiplied the primary voltage by the turns ratio

120*5 = 600 v ac

2. ### Papabravo Expert

Feb 24, 2006
10,179
1,800
Vp : Vs :: Np : Ns

Because the primary has 5 turns for each turn of the secondary it is a step-down transformer.
120 : x :: 5 : 1
Read this as, 120 is to x as 5 is to 1

In the above ratio and proportion statement x must be 24.

screen1988 and bwd111 like this.
3. ### LDC3 Active Member

Apr 27, 2013
920
160
Start at the beginning and state the relation between voltage and number of turns on the primary and secondary so I can see how you did your calculations.

screen1988 and bwd111 like this.
4. ### bwd111 Thread Starter Member

Jul 24, 2013
117
1
I forgot to divide both sides by 5 120/5=24 V AC

5. ### jegues Well-Known Member

Sep 13, 2010
735
43
$\frac{120}{x} = \frac{5}{1}$

$\Rightarrow x = \frac{120*1}{5} = 24$

screen1988, JoeJester and Papabravo like this.