O-LevelPhysicsMagnetism5054/11 · May/June 2025 · Q341 Mark
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.)?
Apurpose of a step-up transformer: to decrease the current in the cable, current used: d.c.
Bpurpose of a step-up transformer: to decrease the current in the cable, current used: a.c.
Cpurpose of a step-up transformer: to increase the current in the cable, current used: d.c.
Dpurpose of a step-up transformer: to increase the current in the cable, current used: a.c.
✓ Correct answer
B: purpose of a step-up transformer: to decrease the current in the cable, current used: a.c.
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