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| Name:_________________________ | Date:_______________ | |
 
Let's Find Out About Electricity | ||
A.
©COPYRIGHT 1999 Strategic Thinking Business P/L Singapore ALL RIGHTS RESERVED
Write the number of the correct answer in the brackets.
B.
1.
Electricity can magnetise an iron rod by passing current through________.
( 
)
(1)
(2)
(3)
(4)
a wire coiled around the rod
a closed circuit
the iron rod
a bulb
2.
When an electric bulb is switched on, ________ produced.
( )
(1)
(2)
(3)
(4)
heat and electricity are
light and sound are
heat and light are
only light is
3.
Which of the following is an insulator?
( )
(1)
(2)
(3)
(4)
Paper-clip
Coin
Staple
Ice-cream stick
4.
A radio changes electrical energy into ________ energy.
( )
(1)
(2)
(3)
(4)
heat
sound
light
chemical
5.
Which of the following requires electricity to work?
(a) computer (b) abacus
(c) photocopier(d) scanner
( )
(1)
(2)
(3)
(4)
(a) and (c).
(b) , (c) and (d).
(a) , (c) and (d).
All of the above.
Write "T" for true and "F" for false.
C.
1.
When the circuit is open, an electromagnet loses its magnetism.
( )
2.
When heat flows through a circuit, the heating element of an oven becomes hot.
( )
3.
Electricity can flow through an open circuit.
( )
4.
We should connect the positive pole of a battery to the positive pole of another battery.
( )
5.
A fuse is used to break a circuit when too much electricity flows through.
( )
Fill in the blanks with the most suitable word.
1.
A battery has a ____________ pole and a _____________ pole.
2.
In an electric bulb, the part which does not conduct electricity is the ____________
____________.
3.
Many household ____________ make use of electricity to function.
4.
Wood, rubber, plastic and paper are called ____________.
5.
A ____________ ____________ is used to find out whether a material is a conductor
of electricity.