Chapter 12 electricity and circuits BY Vishal.M SVCS

1. NAVAPRAJNA PUBLIC SCHOOL
CLASS -VI
CHAPTER:12
Electric Current and
Circuits

2. Where and for what purpose we use electricity
in our daily life?
What do you do when electricity goes off at
night?

3. Electric cell:
● The cell consists of a zinc container having a moist
paste of ammonium chloride.
● Carbon rods fitted with a metal cap and wrapped in a
muslin cloth bag kept in its centre.
● The muslin cloth bag contains a mixture of powdered
coke, graphite, zinc chloride and manganese dioxide.
● The chemicals stored in an electric cell produce
electricity. When these chemicals are used up
completely, the electric cell stops producing
electricity.

4. Electric Bulb:
● Is a device which convert electric energy to heat and
light energy.
● The wire inside the glass case is known as filament and
made of tungsten.
● Inside electric Bulb is filled with a mixture of inert gases
like argon, neon and nitrogen.
● There will be two terminals positive and negative.
● The lower end of the metal casing is filled with an
insulator.
● The electric current flows through the filament which
gets heated up and starts glowing.

5. What is fused bulb?
The bulb in which filament
is broken and do not glow
is known as fused bulb.

6. Electric current:
● Electric current is a form of energy.
● An electric current can flow only when its path
forms a closed loop.
● The flow of electrons through the electric
wire.
● Electrons flows from Negative terminal to
positive terminal.
● Conventional direction of electric current: is
from positive terminal to negative terminal.

7. 1. Give any two ways in which you use
electricity.
2. What is the function of an electric cell?
3. Name essential parts of an electric
Bulb.
4. How does electric current flow in a
closed loop?

17. ELECTRIC CONDUCTOR AND INSULATOR:
CONDUCTOR: the materials that allows
electric current to pass through them are
called conductor.
Examples: metals, salt solution etc
INSULATORS: the materials that do not
allow electric current to pass through them
are called insulators.
Examples: wood, cotton, wool, plastic etc

20. THANK YOU