ElectricityHow It Works

How It Works: What "Potential" Actually Means

Part of Potential Difference · GCSE GCSE Physics revision

This how it works covers How It Works: What "Potential" Actually Means within Potential Difference for GCSE Physics. Revise Potential Difference in Electricity for GCSE Physics with 14 exam-style questions and 30 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 6 of 14 in this topic. Use this how it works to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 6 of 14

Practice

14 questions

Recall

30 flashcards

⚙️ How It Works: What "Potential" Actually Means

The word "potential" refers to stored energy per unit charge at a given point in a circuit — just like gravitational potential energy is the stored energy per unit mass at a given height.

At the positive terminal of a battery, charges are at high potential (lots of energy). As they flow around the circuit through resistors and lamps, they lose energy — their potential drops. At the negative terminal, they are at low potential (little energy remaining).

The potential difference across a component is simply the difference in potential energy per coulomb between the two ends. A large p.d. means each coulomb transfers lots of energy — that component does more work (like a brighter bulb or a faster motor).

The battery's job is to restore the potential — like the ski lift returning skiers to the top of the hill so they can descend (do work) again.

Quick Check: A battery transfers 60 J of energy to 5 C of charge. What is the potential difference of the battery?

Keep building this topic

Read this section alongside the surrounding pages in Potential Difference. That gives you the full topic sequence instead of a single isolated revision point.

Potential Difference and Energy Transfer Key Definitions The Ski Lift Model Understanding Potential Difference

Practice Questions for Potential Difference

Which of the following is the correct definition of potential difference?

A. The total charge flowing through a component per second
B. The resistance of a component measured in ohms
C. The energy transferred per unit charge between two points in a circuit
D. The power dissipated by a component measured in watts

1 markfoundation

Explain what is meant by a potential difference of 6 V across a component.

2 marksstandard

Quick Recall Flashcards

What is 1 Volt?

1 Joule per Coulomb (1 V = 1 J/C)

P.d. equation?

V = E/Q where V = voltage (V), E = energy (J), Q = charge (C). Also V = IR.

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Potential Difference and Energy Transfer

Key Definitions