A transformer is being used to supply a lamp. The secondary coil has more turns than the primary coil. Which statement is correct?
- AThere is an alternating current (a.c.) in the primary coil and a direct current (d.c.) in the secondary coil.
- BThere is a larger current in the secondary coil than in the primary coil.
- CThere is a changing magnetic field in the iron core.
- DIn the iron core there is an alternating current from the primary coil to the secondary coil.