Cambridge IGCSE Combined Science practice

Paper 4 structured question: Energy, work and power

Try the question first, then check the answer and practise the same topic again.

At a glance

Paper

Marks

Topic

Energy, work and power

Exam-style question

Try this first

Paper 4Theory (Extended)4 marks

A factory machine uses energy to perform work.

Description

The machine has a total energy input of 500 J and produces 350 J of useful work.

a
Analyse the efficiency of the machine and discuss the implications of this efficiency.
Your answer
Aim for approximately 4 distinct marking points.
[4]

0 of 1 part answered

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Paper 4Theory (Extended)2 marks

Description

The light bulb consumes 60 J of electrical energy and produces 10 J of light energy.

a
Calculate the efficiency of the light bulb.
Your answer
Aim for approximately 2 distinct marking points.
[2]