A transformer in a computer is used to change the mains voltage of 240 V into 12 V. The secondary coil has 2000 turns. Which statement about the transformer is correct?
- AIt is a step-down transformer and has 100 turns on its primary coil.
- BIt is a step-down transformer and has 40000 turns on its primary coil.
- CIt is a step-up transformer and has 100 turns on its primary coil.
- DIt is a step-up transformer and has 40000 turns on its primary coil.