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Cambridge IGCSE Physics practice

Paper 4 structured question: Energy

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Energy

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Paper 4Theory (Extended)1 marks

Analysis of a Sankey diagram for a heating system.

Diagram Description

Sankey Diagram of a Heating System

The diagram shows the input energy of 1000 J, with 700 J converted to useful heat and 300 J lost as waste energy.

  1. a

    State the percentage of energy that is converted to useful heat.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 4 structured question: Energy

Paper 4Theory (Extended)1 marks

Description

Hydroelectric Power Station

In a hydroelectric power station, water is stored in a reservoir at a height. When released, it flows down through turbines, generating electricity.

  1. a

    State the type of energy converted when water flows down through the turbines.

    Aim for approximately 1 distinct marking point.

    [1]