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IGCSEPhysicsEdexcelPhysics (Modular)Unit 1Revision Notes2. ElectricityElectrical Power & Mains ElectricityElectricity & Heat

Electricity & Heat (Edexcel IGCSE Physics (Modular))

Revision Note

Katie M

Written by: Katie M

Reviewed by: Caroline Carroll

Electricity & heat

  • A current passing through a resistor (or wire) results in the electrical transfer of energy

  • The temperature of a resistor increases due to the collisions of the free electrons within the wire

  • Some of the energy is dissipated into the surroundings by heating

  • This heating effect is utilised in many domestic contexts, including:

    • Electric heaters

    • Electric ovens

    • Electric hob

    • Toasters

    • Kettles

Heating a pan on an electrical hob

heating-downloadable-as-and-a-level-physics-revision-notes

The heating effect of current can be used for many applications such as electric hobs

Examiner Tips and Tricks

Remember that a charge moving around an electrical circuit are an example of an electrical transfer pathway. If you are unsure of how to explain energy stores and transfers use the Energy stores & transfers revision note to help. 

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    Author
    Reviewer
    Katie M

    Author: Katie M

    Expertise: Physics

    Katie has always been passionate about the sciences, and completed a degree in Astrophysics at Sheffield University. She decided that she wanted to inspire other young people, so moved to Bristol to complete a PGCE in Secondary Science. She particularly loves creating fun and absorbing materials to help students achieve their exam potential.

    Caroline Carroll

    Author: Caroline Carroll

    Expertise: Physics Subject Lead

    Caroline graduated from the University of Nottingham with a degree in Chemistry and Molecular Physics. She spent several years working as an Industrial Chemist in the automotive industry before retraining to teach. Caroline has over 12 years of experience teaching GCSE and A-level chemistry and physics. She is passionate about creating high-quality resources to help students achieve their full potential.