Tutorial World Primary 4
 
Name:_________________________ Date:_______________
 

Let's Find Out About Electricity (3.2)

A. Write the number of the correct answer in the brackets.
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.
B. Write "T" for true and "F" for false.
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.

 

()
C. 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.

 

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