Learning objective

Grasp the qualitative idea of energy transfer efficiency.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

Cambridge IGCSE PhysicsMotion, forces and energyCore content

Study support

Understand this objective

Quick explanation

This point belongs to Energy resources, especially Energy resources outcomes.
You need to be able to grasp the qualitative idea of energy transfer efficiency.
The key ideas to know are Understand and Describe.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

UnderstandDescribe

Why it matters

This objective helps connect Energy resources outcomes to exam-style questions, flashcards, and revision notes for Energy resources.

Revision tools

Flashcards10 linked cards

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Practice Questions7 linked questions

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0 of 5 attempted

Paper 3Theory (Core)1 marks

Description

A heating system uses 1000 J of energy input to produce 800 J of useful heat energy.

a
State the efficiency of the heating system.
Your answer
Aim for approximately 1 distinct marking point.
[1]

Revision notestopic notes

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