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GCSE Physics · key term
The input coil of a transformer, connected to the alternating supply.
Used by AQA, Edexcel and OCR
Specification 4.7.3.4 · Paper 2
Revise: TransformersThe primary coil is connected to the input supply; the secondary coil provides the output. Iron is used because it is easily magnetised, so it carries the changing magnetic field effectively from one coil to the other.
Specification 13.5, 13.6, 13.7P, 13.10 · Paper 2
The transformer coil connected to the alternating-current supply.
When identifying a transformer from a diagram, compare the secondary coil with the primary coil: more secondary turns means step-up; fewer means step-down.
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The primary coil is connected to an alternating-current (a.c.) supply. The secondary coil belongs to another circuit. The wires of the two coils do not touch, so charge does not travel directly from one circuit to the other.
The input coil of a transformer, connected to the alternating voltage supply.
The input coil of a transformer, across which an alternating potential difference is applied.
The coil connected to the input supply of a transformer.
Specification P4.2g, P4.2h, P4.2i · Paper 1 (Foundation), Paper 3 (Higher)
The input coil of a transformer, connected to an alternating-current supply.
Revise: TransformersA transformer transfers electrical energy between two separate circuits using electromagnetic induction. Its main parts are an input coil called the primary coil, an output coil called the secondary coil, and an iron core around which both coils are wound. The coils are not joined by a conducting wire, so charge does not travel directly from one circuit to the other.
The input winding of a transformer, connected to the alternating supply.
The coil of a transformer connected to the input alternating potential difference.
Paper 1, Paper 2
Revise: Transformers and the Transformer EquationsA transformer transfers electrical energy between two circuits without joining them with a conducting wire. It has a primary coil and a secondary coil, both wound around the same iron core. The primary is the input; the secondary is the output.