← all questions · Physics · 0625 · Paper 4
A transformer has 8000 turns in the primary coil connected to a 240 V mains supply, and a 6.0 V lamp connected to the secondary coil operating at full brightness. The current in the lamp is 2.0 A. The transformer operates with 100% efficiency.
Calculate the current in the primary circuit.
0625/04/SP/23Cambridge IGCSE Physics 0625 · Specimen 2023 · Paper 4 · Question 12(b)
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Suggested time: 3 min