Part 6 - Electricity and Magnetism
Unit-9 Circuits
1. Fill in each blank using the word in the box. (complete, conductors, insulators, circuit)
a). The path through which a current flow is called a circuit.
b). A complete circuit is needed for an electric current to flow.
c). Materials that allow electricity to pass through them are called conductors.
d). If there is a gap in the circuit, the bulb will not light up.
e). A complete circuit is needed for an electric current to flow.
f). Mains electricity is made in a power-station.
g). An electric current can flow only through certain materials.
h). When a battery is connected to a bulb by two wires, it will light the bulb.
i). Electricity is brought to our homes through thick wires called cables.
j). Some materials, like metal and water, let the electric current flow through them easily. They are called conductors.
k). Materials that do not allow electricity to pass through them are called insulators.
l). Electricity cannot jump across a gap.
m). Some materials, like rubber and wood, do not let the electric current flow through them. They are called insulators.
n) A battery has chemicals in it and stores energy.
o) The electricity that moves along a wire is called an electric current.
Q.2: What does the word circuit mean?
Ans. The path along which an electric current flow is called a circuit.
Q.3: What is electricity which moves along wires called?
Ans: The electricity that moves along the wire is called an electric current.
Ans: The electricity that moves along the wire is called an electric current.
Q.4: Why does flex have a thin layer of plastic on the outside?
Ans: Flex is coated with a thin layer of plastic because plastic is an insulator.
Ans: Flex is coated with a thin layer of plastic because plastic is an insulator.
Q.5: Mark the correct statements with a(T) and the wrong ones with (F).
a). The filament is the path along which electric current flows. (T)
b). The electricity that moves along the wire is called an electric current. (T)
c). Metal and water are conductors of electricity. (T)
d). A gap in the circuit will allow an electric current to flow. (F)
e). A complete circuit allows electric current to flow. (T)
f). A pencil and a wooden ruler are good conductors of electricity. (F)
g). The path along which the electric current flows is called a circuit. (T)
h). Flex is coated with a thin layer of plastic because plastic is an insulator. (T)
i). When a battery is connected to a bulb by two wires, it will light the bulb. (T).
b). The electricity that moves along the wire is called an electric current. (T)
c). Metal and water are conductors of electricity. (T)
d). A gap in the circuit will allow an electric current to flow. (F)
e). A complete circuit allows electric current to flow. (T)
f). A pencil and a wooden ruler are good conductors of electricity. (F)
g). The path along which the electric current flows is called a circuit. (T)
h). Flex is coated with a thin layer of plastic because plastic is an insulator. (T)
i). When a battery is connected to a bulb by two wires, it will light the bulb. (T).
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