Problem 91-11    Source:  Problem developed by the site author.

a)the number of turns in the secondary.

b) the number of turns in the primary.

Solution of the Problem 91-11

Item a

To solve this problem we will use eq. 91-13, repeated below.

After some algebraic work and replacing the variables with their respective numerical values, we obtain:

Item b

To calculate the number of turns of the primary, we can use eq. 91-12 or, use the transformation ratio given by a = V₁ / V₂ = 2,200 / 220 = 10. Therefore, we have: