Physics · May / June 2025 · Paper 12 · Question 35

A transformer is used to power a lamp. [diagram of transformer with primary coil, secondary coil, iron core and lamp] There are more turns on the secondary coil than on the primary coil. Which statement is correct?

1. AThere is an alternating current (a.c.) in the primary coil and a direct current (d.c.) in the secondary coil.
2. BThere is a larger current in the secondary coil than in the primary coil.
3. CThere is a changing magnetic field in the iron core.
4. DIn the iron core there is an alternating current from the primary coil to the secondary coil.

As printed in the paper