The photograph shows a transformer which has been cut in half. The transformer consists of primary and secondary coils wound around the same laminated iron core. The diagram shows a cross-section of the iron core and the two coils. One coil consists of a few turns of thick wire. The other coil has many turns of thinner wire.
a) Explain how an e.m.f. is induced in the secondary coil.
b) The transformer in the photograph has one coil with 32 turns of thick wire. and the other with 512 turns of thin wire. Either coil can be the primary. with the other being the secondary. Describe the function of the transformer when the 512-turn coil is the primary.
c) When in use, the 32-turn coil always carries the greater current. Explain why this is so.
d) Explain why this coil is made with much thicker wire.
e) Suggest a reason why the core is made of thin laminated sheets of soft iron.
None. This is a theory question.
The Attempt at a Solution
a) A voltage is provided in the primary coil which produces a current . This changing current causes a magnetic flux in the core. Flux links in the secondary. This changing flux induces a EMF in the secondary coil.
b) Step down by a factor of 16.
d) Laminated reduces eddy current. Thin hence reduces it further. Soft iron strengthen the flux.
4. The problem with this question
I don't understand what question (c) is asking for? Can I be guided in the right direction. Thanks in advance.