Class 7 Physics Electric Current and its Effects Electric Current

An electric current is a flow of electric charge.

  • This electric charge is carried by moving electrons(charge carriers) in a wire.
  • Electric current is measured as rate of flow of charge.
  • The SI unit for measuring an electric current is the Ampere (A).
  • Electric current is measured using a device called an Ammeter.
  • Electric current is denoted by symbol I.
  • In past, it was considered that the current is the flow of protons from positive battery terminal to negative battery terminal through the circuit.
  • Later it was discovered that the currentis the flow of electrons from negative battery terminal to positive battery terminal through the circuit.

As a convention, current is still considered to flow from positive terminal to negative

SI stands for “The International System of Units” (abbreviated from French: Système international d'unités)

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