Page 137 - Science Class 06

Examples of Insulators:

1. Glass
Aim : To show silver is a good conductor
of electricity. 2. Plas c
Materials required : Copper wire, a 3. Rubber

switch, a cell, a bulb, a small wire of
4. Porcelain
silver.
5. Wood
Method : Make a circuit using cells,
copper wire, switch and bulb as shown in 6. Dis lled or pure water

the picture. 7. Ceramic

Bulb 8. Asphalt
Cell
Uses of Insulators

v Insulators are used to cover electric
Cooper wire
wires or appliances to avoid electric
shock.
Switch
v The handles of electric tools are also
Now, switch on, you will see the bulb made up of insulators.
starts glowing. Now, cut a small part of v Rubber gloves are used by electrician
the wire and connect the broken loop while working with electric appliances.
with a silver wire. Again put on the
IS WATER A CONDUCTOR OR AN
switch, you will see the bulb is glowing.
It shows that silver is also a good INSULATOR?
conductor. Water is neither a good conductor nor an
insulator. We can call it a poor conductor.

INSULATOR Water does not allow the charge to flow but
Insulators are materials that do not allow displaces the charge. Therefore, it is also

the transfer or that slow the transfer of called dielectric. Dielectrics are the sub-
heat or electricity. Insulators can be made stances through which electrical a rac on

of many different types of materials, but is maintained. Examples of some other
metals are generally not insulators. dielectrics are glass, wax, oil, wood, etc.
However, a li le amount of water shows
that it has some electric nature.

1. Give examples of any three conductors.

2. Write the uses of insulators.
3. What do you mean by dielectrics?

Science-6 137