Last updated on Sep 20, 2026

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

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Electrical Power

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Define power

Rate at which energy is transferred

Define power (work done)

Rate at which work is done

Unit of power

Watt (W)

Power vs current & voltage

Directly proportional to both

Power loss vs resistance

Proportional to resistance

Power loss vs current

Proportional to square of current

Formula: $E$ using $P$ & $t$

$E = Pt$

Formula: $E$ using $Q$ & $V$

$E = QV$

Unit of $P$ (power)

Watts (W)

Unit of $E$ (energy transferred)

Joules (J)

Unit of $t$ (time)

Seconds (s)

Formula: Power from energy & time

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

Formula: Power from work done & time

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

Unit of $W$ (work done)

Joules (J)

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

Current, Potential Difference & Resistance

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Static Electricity

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

Current, Potential Difference & Resistance

Series & Parallel Circuits

Energy Transfers

Static Electricity

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

Current, Potential Difference & Resistance

Series & Parallel Circuits

Energy Transfers

Static Electricity

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

Current, Potential Difference & Resistance

Series & Parallel Circuits

Energy Transfers

Static Electricity

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