The best material for the core of the primary and secondary coils of an induction coil is

JAMB 1980

The best material for the core of the primary and secondary coils of an induction coil is

A. copper, because it has a good conductor of electricity

B. steel, because it becomes magnetic and retains its magnetism for a long time

C. rubber, because it is a good insulator and the user is prevented from shock

D. soft iron, because it becomes magnetic but easily loses its magnetism

E. glass, because it is transparent

Correct Answer: Option D

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