4.2.4.2 Appliances

Spec reference: 4.2.4 (subtopic).

What you need to know

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Self-assessment (checklist)

• I can explain how the power transfer in a circuit device is
• I can describe what affects the amount of energy an
• I can describe how different domestic appliances transfer
• I can describe how charge causes work to be done in a
• I can recall and apply the equation linking energy
• I can rearrange the equation linking energy transferred,
• I can recall and apply the equation linking charge flow,
• I can rearrange the equation linking charge flow, energy
• I can describe, with examples, the relationship between

Key steps (method)

• Identify what the question is testing and use the correct equation/definition.
• Show substitutions and units clearly.

Common mistakes

• Unit conversions, rearranging errors, or quoting a law without applying it.