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Physics resources for IGCSE or GCSE students

[Science home]

Revision sheets for IGCSE or GCSE physics.
This series revision sheets are based on the IGCSE & GCSE syllabuses.
Lots of formulas, definitions and key points to learn off.
There are also accompanying test sheets to check your memorisation. 

The idea is read the information and than print the quiz sheet and try the questions.

Physics exercise

Revision Exercise five:

Energy resources and energy transfer

Energy transfer

forms of energy: thermal (heat), light, electrical, sound, kinetic, chemical, nuclear and potential (elastic and gravitational)

Conservation of energy : energy is never created or destroyed, it changes from one form to another.

Unit of energy: joule (J)

efficiency = useful energy output / total energy output

energy transfer may take place by conduction, convection and radiation

Work and power

work done = force × distance moved

W = F × d

work done is equal to energy transferred

gravitational potential energy = mass × g × height

GPE = m × g × h

 Edmund Becquerel
 

Edmund Becquerel
(Discovered solar energy)

    kinetic energy = ½ × mass × speed2

    KE = ½ × m × v2

    power is  rate of transfer of energy or the rate of doing work

    power = work done / time taken

    P = W/ t

    Energy resources and electricity generation

    electricity generation uses:

    renewable and non-renewable resources

    renewable

    • wind

    • water

    • geothermal resources

    • solar heating systems

    • solar cells

    non-renewable resources

    • fossil fuels

    • nuclear power (but not in danger of running out)

     

     

    Quiz for revision exercise five: Energy quiz

 

 

 

 

  
Put your hand on a hot stove for a minute, and it seems like an hour. Sit with a pretty girl for an hour, and it seems like a minute. That's relativity.
Albert Einstein

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