Current & Circuit Components

• What 3 subatomic components make up an atom?

  Electrons, Protons and Neutrons.
• Describe the structure of an atom.

  Neutrons and protons in the nucleus. Electrons surrounding the nucleus in shells.
• An atom contains 2 types of charged particles, name both of them and state their changes.


  Proton (+1) and Electron (-1).
• In a closed circuit, if there is a potential difference in the circuit there will also be a current.
• How is current defined?

  As the rate of flow of charge (or electrons) around a circuit.
• What are the units of charge?

  Coulombs, C.