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Combined Science: Physics

GCSE · Edexcel · foundation

QuestionsFlashcards

Expressing Quantities & SI Units
- Units & Prefixes
  8
- Conversions & Standard Form
  6

Atomic Structure
Radioactive Decay
Dangers of Radiation
- Dangers of Radiation
  5
- Contamination & Irradiation
  6

Magnetism
Electromagnetism & The Motor Effect
- Magnetic Fields in Wires
  6
- Magnetic Fields in Solenoids
  6

Transformers & the National Grid
- The National Grid
  5
- The Ideal Transformer Equation
  3

Current Flashcards

All 5 cards in this deck

What is electric current?: The rate of flow of charge; measured in amps (A).
True or false? The current in a metal wire is a flow of protons.: False. In metals the current is a flow of electrons.
How should an ammeter be connected to measure the current in a component?: In series with the component.
What is the equation linking charge, current and time?: charge (C) = current (A) × time (s), $Q = I \times t$ .
In circuit diagrams current is drawn flowing from + to −. Which way do the electrons actually flow?: From the negative terminal to the positive terminal (the opposite way).