transformer

Diagram shows a transformer which is made of two coils and a core.
Rajah menunjukkan sebuah transformer yang dibina dari dua gelung dan satu teras.





Which of the following pairs of material is suitable to be used as a coil and core?
Antara pasangan bahan yang berikut yang manakah sesuai digunakan sebagai gelung dan teras?




Coil
Gelung
Core
Teras
A
Nichrome
Steel
B
Nichrome
Soft iron
C
Copper
Soft iron
D
Copper
steel





 Answer : C 
The material suitable for the coil is copper and for the core is soft iron