Physics · May / June 2025 · Paper 11 · Question 34

A step-up transformer is connected between a power station and a long-distance electricity transmission cable. What is the purpose of the step-up transformer, and does it operate using alternating current (a.c.) or using direct current (d.c.)?

1. Ato decrease the current in the cable; d.c.
2. Bto decrease the current in the cable; a.c.
3. Cto increase the current in the cable; d.c.
4. Dto increase the current in the cable; a.c.

As printed in the paper