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Understanding Current and Charge

Part of Current & Charge · GCSE GCSE Physics revision

This deep dive covers Understanding Current and Charge within Current & Charge for GCSE Physics. Revise Current & Charge in Electricity for GCSE Physics with 19 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 2 of 13 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 2 of 13

Practice

19 questions

Recall

30 flashcards

📚 Understanding Current and Charge

Charge Equation
Q = I × t
Charge (Coulombs) = Current (Amps) × time (seconds)

Current is the rate of flow of charge — how much charge passes a point per second.

  • 1 Ampere (A) = 1 Coulomb of charge flowing per second
  • If 2 A flows for 10 s: Q = 2 × 10 = 20 Coulombs passed

What actually flows in a metal wire:

  • In metal wires: electrons (negative charges)
  • Electrons flow from negative to positive terminal
  • Conventional current is defined as positive to negative (historical convention — defined before electrons were discovered)

Keep building this topic

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

The River of ElectronsMeasuring CurrentCurrent and Charge FlowHow It Works: Why Electrons Move in a Circuit

Practice Questions for Current & Charge

What is electric current?

  • A. The total energy stored in a circuit
  • B. The rate of flow of charge
  • C. The force that pushes electrons around a circuit
  • D. The opposition to the flow of charge
1 markfoundation

Explain why an ammeter must be connected in series in a circuit.

2 marksstandard

Quick Recall Flashcards

What is 1 Ampere?
1 Coulomb of charge flowing per second (1 A = 1 C/s)
Charge equation?
Q = It where Q = charge (C), I = current (A), t = time (s)

19 questions on Current & Charge — practise free

Instant marking, adaptive difficulty, and 30 spaced repetition flashcards. Free until your GCSEs.

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The River of Electrons

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Measuring Current