Class 7 Physics Electric Current and its Effects Electric Circuit

Electric Circuit

An electric circuit is a path in which electrons (or current) flow.

  • If the circuit is incomplete or broken, the current doesn’t flow. This type of circuit is called an Open Circuit.
  • If the circuit is complete, the current flows. This type of circuit is called a Closed Circuit.
  • If the circuit contains some material which does not allow current to flow through it, in that case too, even if the circuit is complete, the current doesn’t flow. These materials are called non-conductors.
  • A circuit usually contains a Power Source, which is the source of electrons and a Load, which is the electrical appliance, like a bulb, needing electricity to run.
  • A switch or key in the circuit is used to make or break the circuit to start or stop current flow.
  • An electric circuit is represented by a Circuit Diagram.
  • Circuit Diagram is a pictorial representation of a circuit with electrical symbols for its corresponding parts.

 

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