EMF sources

Magnetism

• Describe how magnetism is used to create voltage.
• State four factors that determine how much voltage is created using magnetism.
• Provide at least three practical examples of where this principle is used.
  

Heat

• Describe how heat is used to create voltage.
• State the factors that determine how much voltage is created using heat.
• Provide at least two practical examples of where this principle is used.

Light

• Describe how light is used to create voltage.
• State the factors that determine how much voltage is created using light.
• Provide at least two practical examples of where this principle is used.
  

Force

• Describe how force is used to create voltage.
• State the factors that determine how much voltage is created using force.
• Provide at least three practical examples of where this principle is used.

Chemical reaction

• Describe the principle of producing an electric current from a primary cell, secondary cell and a fuel cell.
• Provide at least one practical example for each cell type.
• State the factors that determine how much current is created using a chemical reaction.

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