Answer:
12000 coils
Step-by-step explanation:
It is given that,
The voltage across the primary winding V₁ = 350,000 V
The voltage across the secondary winding V₂ = 17500 V
Number of coils in secondary winding, N₂ = 600
We have to find the number of coils in primary winding. It can be calculated suing turn ratio equation as :




Hence, the number of coils in primary winding is 12,000