The picture above shows an electric circuit. An electric circuit is continuous path over
which electrons move.
An electrical circuit has four parts: a source, light bulb, wires, and
switch. The source of potential energy provides potential difference for the current to flow.
The load is an electrical appliance. Here, the light bulb is the load. The load provides the
resistance. The wire connects the various circuit components and provide a complete path
for the current to flow. A switch is used to turn the current flow on and off. In the setup, a
wire is attached to the negative end of the battery, while the other wire is attached to the
positive end. Both wires are attached to the bulb. Such a circuit is called a closed circuit.
A closed circuit makes the bulb light up because the path of electricity is complete,
allowing electricity to flow through it. Electricity flows from the negative to the positive
terminal of the dry cell. Another kind of circuit is an open circuit. Electricity does not end of
the circuit to the other end. To turn on the lights, you have to close the circuit by pushing the
switch on. To turn off the lights, you have to open the circuit again by pushing the switch off.
Match the concept in column B with its description in column A.
Column A
Column B
1. circuit where electricity cannot flow
a. battery
2. A complete path of electricity
b. circuit
3. A source of energy
c. closed
4. Circuit where electricity flows freely
d. light bulb
5. Connect the light bulb and the battery
e. open
f. wires

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