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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Energy, work and power

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Energy, work and power

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Paper 3Theory (Core)3 marks

In an electrical circuit, energy is transferred when work is done.

Description

Electrical Work

When an electric current flows through a circuit, work is done on the components, resulting in energy transfer that powers devices such as light bulbs and motors.

  1. a

    Describe how energy is transferred in an electrical circuit when work is done.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 3 structured question: Energy, work and power

Paper 3Theory (Core)3 marks

Description

Work and Energy

In a mechanical system, when a force is applied to move an object, work is done. This work results in a transfer of energy to the object, which can be observed as a change in its kinetic energy.

  1. a

    Explain the relationship between work done and energy transferred in mechanical processes.

    Aim for approximately 3 distinct marking points.

    [3]