Aapka experience bilkul sahi hai. Bade coil me magnetic field jyada circular hota hai, issliye total same turns ke baad bhi heating ki samasya nhi aati, coil bhi aaraam se dal jata hai. Maine kaafi complex equation se ye faayda ka pata lagaya. 1-4 me 1 aur 1-6 me 2 baar wala winding utna sahi nhi.🙏