A simple transformer is being designed to operate with the highest possible efficiency by reducing various energy losses.
Which row in the table below shows the correct design specifications for the coils and the core to achieve this?
| Primary and Secondary Coils | Core Structure and Material | |
|---|---|---|
| A | Thick copper wire | Laminated soft iron |
| B | Thin copper wire | Solid soft iron |
| C | Thick iron wire | Laminated copper |
| D | Thin iron wire | Solid copper |
Row A
Row B
Row C
Row D
275 exam-style questions on CIE IGCSE Physics 4.5 Electromagnetic effects, covering 4.5.1a Electromagnetic induction, 4.5.1b Direction of an induced e.m.f., 4.5.2 The a.c. generator, 4.5.3a Magnetic effect of a current and its applications, 4.5.3b Strength and direction of the field around wires and solenoids, 4.5.4a Force on a current-carrying conductor, 4.5.4b Force on beams of charged particles, 4.5.5 The d.c. motor, 4.5.6a Construction and operation of a transformer, 4.5.6b Turns ratio and current in a transformer, and 4.5.6c High-voltage transmission of electricity. Each one has a worked solution and a mark scheme showing where the marks go.