Download WORK EDUCATION PROJECT

WORK
EDUCATION
PROJECT
SUBMMITED BY :
MOUTRISHNA GAYAN
CLASS : VII ROLL. no : 9
Topic : symbolic
representation
Definition :
In different field of life we use to
represent different items , actions or events
with a simple diagram , this pictorial
representation is known as ‘symbol’ .
So
,
symbol
means
of
symbolic
representation
:
1.
The
pictorial
representations can be understand easily .
2. The symbols can be understand and learned
by even illiterates or uneducated .
 3. In multi – lingllistic world the pictorial
representation develops a universal language.
 4. The pictorial representation emphasis on
important expect of things .
 Symbolic diagram of wire : the wire is most
common thing used in electricity a required .
The wire , made connecting material
provides path for flow of electric current .
 a)Wire joints : To expand the path of
electricity a network of wire are inter –
connected for the larger the joint of wire are
represented in two ways .
In first methods of symbolic representation the
joints are represented with normal touch wire lines .
In second method a dot is used to show the wire
joints.

These way of representation effects of symbolic
representation of wires overlapping.
 b) Overlapping wires : The overlapping of wire
means the wires are crossing each other but wires
are not inter – connected .

 In some cases the loops are used to represent the
overlapping of wires .
 In some cases where dots are used to represent the
joints of wires , simple crossing of wires used to
represent overlapping of wires .
 2. Cell : The are source of electrical energy and represented with
symbol showing its two terminals .
 3. Battery : The combination of two or more cells is called
‘battery’ . The battery is represented as symbol shown in diagram
.
 4 .Direct current supply : The electricity which the current flows
in one direction .
 5. Alternating current supply : In A.C electricity the direction of
current and value of voltage keeps changing . It is represented by
symbol of wave .
 6. Switch : The switch is a device which is used to make or break
the electrical circuit . Different types of switches used in electrical
circuit .
8. Tube light : The tube light is an electrical devices , which is use
to produce light with help of two other devices , named as
- Starter .
- Chock / ballast .
a) Fan : The electric fan converse electrical
energy into
mechanical energy .
10) Motor : The motor is an electrical device which converts
electrical energy into chemical energy .
11. Socket or wall outlet : The socket are open electrical points ,
which can be used to connect removable electrical appliances .
There are two types of sockets .
a) Two pin socket .
b) Three pin socket .
12. Electrical terminals (in A.C) : There are three terminals in normal
houses wiring or electrical system , which are called as –
(a) phase – represented
with ‘p’ .
(b) Neutral – represented with ‘n’.
(c) Earth – the terminal of earth is
for safety purpose .
13. Fuse : The fuse is a safety device , which
breaks the electric circuit when current flows
more than the specified limit .