Which row in the table correctly states the ideal materials for the coils and the core of a transformer, along with the physical reason for their choice?
| Material for Coils | Reason | Material for Core | Reason | |
|---|---|---|---|---|
| A | Copper | Low electrical resistance | Soft iron | Easily magnetized and demagnetized |
| B | Steel | High mechanical strength | Soft iron | Hard magnetic properties |
| C | Copper | Low electrical resistance | Plastic | Good electrical insulator |
| D | Iron | High magnetic permeability | Copper | High thermal conductivity |
A
B
C
D
136 exam-style questions on CIE IGCSE Physics 4.5.6a Construction and operation of a transformer. Each one has a worked solution and a mark scheme showing where the marks go.