Electrical Power (OCR GCSE Physics A, Combined (Gateway Science Suite)): Flashcards

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Electrical Power
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Definition of power

Rate at which energy is transferred

Power also represents the rate of

Work done

Unit of power

Watt (W)

Power is directly proportional to

Current and voltage

Power loss is proportional to

Resistance and square of current

Energy formula (power × time)

E=PTE = PT

Energy formula (charge × voltage)

E=QVE = QV

Unit of energy transferred

Joules (J)

Unit of time in power equations

Seconds (s)

Power formula (using energy & time)

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

Power formula (using work done & time)

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

Explore OCR GCSE Physics A, Combined (Gateway Science Suite) Revision Notes by Topics

Current, Potential Difference & Resistance

Series & Parallel Circuits

Energy Transfers

Explore OCR GCSE Physics A, Combined (Gateway Science Suite) Model Answers by Topics

Current, Potential Difference & Resistance

Series & Parallel Circuits

Energy Transfers

Explore OCR GCSE Physics A, Combined (Gateway Science Suite) Quizzes by Topics

Current, Potential Difference & Resistance

Series & Parallel Circuits

Energy Transfers

Explore OCR GCSE Physics A, Combined (Gateway Science Suite) Exam Questions by Topics

Current, Potential Difference & Resistance

Series & Parallel Circuits

Energy Transfers

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