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Energy transfer in electrical circuits

Electricity and circuits • Electrical energy transfers

Key concepts

What you'll likely be quizzed about

  • Electrical energy is the energy carried by moving electric charges through a conductor.
  • It is measured in joules (J), and the flow of these charges constitutes an electric current.
  • When a circuit is completed, electrons move through the wire, thus enabling the operation of electrical devices.

Flashcards

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What is the relationship between current and charge?

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Current is the rate of flow of charge, defined as I = Q/t, where Q is the charge passing a point over time t.

Key notes

Important points to keep in mind

Electric current flows only in closed circuits.

Always calculate voltage drop across components in a circuit.

Power equals work done per unit time.

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