किस प्रकार का ट्रांसफार्मर प्राथमिक से द्वितीयक पक्ष में धारा (current) के स्तर को बढ़ाता है?

In which unit is the power rating of a transformer expressed?

In a transformer, it is generally preferred to wind the low-voltage winding close to the core and the high-voltage winding over the low-voltage winding. What is the primary advantage of this type of arrangement?