Electrical Power (AQA GCSE Physics Combined Science): Flashcards

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Electrical Power
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Definition of power

Rate at which energy is transferred

Power also indicates rate of

Work done

Unit of power

Watt (W)

How is power related to current and voltage?

Directly proportional to both

Power loss is proportional to...

Resistance and square of current

Formula: Energy transferred (power & time)

E=PTE = PT

Formula: Power (energy & time)

P=EtP = \frac{E}{t}

Formula: Energy (charge & p.d.)

E=QVE = QV

Formula: Power (work done & time)

P=WtP = \frac{W}{t}

Unit for energy transferred

Joules (J)

Unit for time in power equations

Seconds (s)

Unit for work done

Joules (J)

Explore AQA GCSE Physics Combined Science Revision Notes by Topics

Current, Potential Difference & Resistance

Series & Parallel Circuits

Energy Transfers

Explore AQA GCSE Physics Combined Science Model Answers by Topics

Current, Potential Difference & Resistance

Series & Parallel Circuits

Energy Transfers

Explore AQA GCSE Physics Combined Science Quizzes by Topics

Current, Potential Difference & Resistance

Series & Parallel Circuits

Energy Transfers

Explore AQA GCSE Physics Combined Science Exam Questions by Topics

Current, Potential Difference & Resistance

Series & Parallel Circuits

Energy Transfers

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