The outgoing voltage : 72 V
Given
Vp=primary=120 V
Np=10
Ns=6
Required
the secondary voltage
Solution
[tex]\tt \dfrac{V_p}{V_s}=\dfrac{N_p}{N_s}[/tex]
Input the value :
[tex]\tt \dfrac{120}{V_s}=\dfrac{10}{6}\\\\V_s=\dfrac{120\times 6}{10}=72~V[/tex]