An electric circuit is a closed loop that allows electric current to flow from a power source, such as a battery, through conducting materials, like wires, to an electrical device and back to the power source. The key components of a circuit are a power source, conducting wires or strips, a device to use the current like a light bulb, and a switch to open or close the circuit. When a switch in a flashlight circuit is closed, current can flow from the battery through the conducting strips to the light bulb, causing it to glow, before returning to complete the circuit.

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3. • An electric circuit is a closed path in which
current flows.
• In general ,a circuit has the following
components:-
(1.)A source of electric current such as a battery
of one or more cells.
(2.)Connecting wires which are normally
insulated copper wires.
(3.)An appliance which is using the current ,for
e.g. a bulb or an electric iron.
(4.)A key which is a switch.

5. When you switch on an electric
torch the bulb glows and gives off
light. The bulb glows because, when
you press the torch. The switch,
electric current flows from the
battery in the torch to the bulb
through conducting metal strips in
the conducting strips provide a
closed path for the current to flow.

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nneecceessssaarriillyy bbee aa cciirrccuuiitt..