Calculate efficiency

GCSE · Physics · AQA · P1.6 — Efficiency: useful output / total input as a decimal or percentage; methods to reduce unwanted transfers (lubrication, insulation)

Question

An LED transfers 8.0 J of light energy from every 25 J of electrical energy. Find its efficiency.

2 marks · take your time before peeking.

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Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.