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ELECTRIC CIRCUIT

CONTENT

  1. Definition of Electric Circuit
  2. Resistance
  3. Conductors and Insulators
  4. Ohm’s Law

 

Definition of Electric Circuit

An electric circuit is an arrangement of electric current sources and conducting paths through which a current can continuously flow. In a simple circuit consisting of a small bulb, a battery and two pieces of wire, the electric current flows from the negative terminal of the battery through one piece of connecting wire, through the bulb filament, through the other piece of connecting wire, and back to the positive terminal of the battery. When an electric current flows through the filament, the filament is heats up and the bulb lights. A switch can be placed in one of the connecting wires.

The flash light is an example of a circuit. When the switch is open the connection is broken, electric current does not flows through the circuit and the bulb does not light. When the switch is closed, current flows and the bulb does lights up.

 

Resistance

This is another important property that can be measured in an electrical system.

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