ElectricityDiagram

Electrical Power Formulas

Part of Electrical Power & Energy — GCSE Physics

This diagram covers Electrical Power Formulas within Electrical Power & Energy for GCSE Physics. Revise Electrical Power & Energy in Electricity for GCSE Physics with 15 exam-style questions and 30 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 4 of 15 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.

Topic position

Section 4 of 15

Practice

15 questions

Recall

30 flashcards

📊 Electrical Power Formulas

Diagram showing P = IV and P = I²R formula triangles for electrical power

Figure 1: The three power equations and the energy equation — all derived from P = IV and V = IR.

Keep building this topic

Read this section alongside the surrounding pages in Electrical Power & Energy. That gives you the full topic sequence instead of a single isolated revision point.

Kilowatt-Hours (kWh) — The Billing Unit Power Ratings of Common Appliances The Expensive Shower Three Power Equations — When to Use Each

Practice Questions for Electrical Power & Energy

What is the unit of electrical power?

A. Joule (J)
B. Ampere (A)
C. Watt (W)
D. Volt (V)

1 markfoundation

Explain why the National Grid transmits electricity at high voltage to reduce energy losses.

2 marksstandard

Quick Recall Flashcards

What is 1 watt?

1 joule of energy transferred per second (1 W = 1 J/s)

Unit of power?

Watt (W) or joules per second (J/s)

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Kilowatt-Hours (kWh) — The Billing Unit

Power Ratings of Common Appliances