Physics 9702 · AS & A Level · Electromagnetic induction

Electromagnetic induction — practice question

A straightforward transformer is shown in Fig. 6.1.
(a(i))[2]

State why the iron core is made into thin layers.

(a(ii))[1]

State what is meant by an ideal transformer.

(b)[2]

An ideal transformer has $300$ turns on the primary coil and $8100$ turns on the secondary coil. The root-mean-square input voltage to the primary coil is $9.0\,\text{V}$. Calculate the peak voltage across the load resistor linked to the secondary coil.

Worked solution & mark scheme

This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: reduce core power loss due to eddy/induced currents

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