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6. Principle of conservation of energy

  • energy can only be transferred to others
  • energy cannot be created or destroyed only transferred
  • energy can be created or destroyed

7. Definition of curent

  • rate of flow of electrons
  • rate of flow of charge
  • rate of flow of protons

8. what is ohms law?

  • the current flowing through a metal wire at a constant temperature in inversely proportional to the pd across it
  • the current flowing through a metal wire at a constant temperature is proportional to the pd across it
  • the current flowing through an insulator at a changing temperature is proportional to the pd across it