Fundamental of electricity Fundamental of electricity

Fundamental of electricity

1. Fundamental of
Electricity

2. Electrical and Electronic Symbol
Name Symbol Letter Symbol
Resistor R or r
Variable resistor or
Potentiometer
P or f
Capacitor(Non-Polarized)

C or K
Polarize Capacitor or
Electrolyte Capacitor
+ - C or K
Inductor L
Diode N or d

3. Electrical and Electronic Symbol
Name Symbol Letter Symbol
LED n or d
Photo Diode n or d
Zener Diode N or d
N-P-N Transistor T
P-N-P Transistor T
Cell N
Battery B
Earth OD(Earth)
OA(Ground

4. Electrical and Electronic Symbol
Name Symbol Letter Symbol
Fuse Si or e
Circuit Breaker E
Bulb h
Lamp Indicator H
Relay Re
 
Solenoid or Shut down coil
S
Speaker S
Horn S

5. Electrical and Electronic Symbol
Name Symbol Letter Symbol
Buzzer S
Voltmeter V
Ammeter A
Motor/Fan M
Galvanometer g
Ignition Switch B
Pressure switch b
V
A
M
P

6. Electricity
Electricity is one form of energy which is used to
perform various operations by moving of charge
carriers through conductors and other components
determined by the type of application.
EMF- Electromotive force:-
E M F is the rate at which energy is drawn from a
source that produces a flow of electricity in a
circuit, expressed in “volts”.

7. Electricity
Voltage (Potential Difference):-
It is defined as the amount of work required to
move a charge from one point to the other. It is
expressed in ‘volts’ and is denoted by ‘V’.
Current:-
The rate of flow of electrical charge in any
conductor is called current. It is expressed in
‘amperes’ or ‘amps’ and is denoted by ‘I’.

8. Why Use DC Supply in our
Machine
There are reasons :
1- Biasing
2- Direction
2- Portability

9. 24V
24V
+24V
0
-24V
48V
CONCEPT OF (+)ve AND (-)ve
SUPPLY

10. OHM’S LAW
At constant temperature current flow through
conductor is directly proportional to the
voltage.
V proportional I
V=IR where R is constant which is called
resistance

11. Power
P=w/t where p is power its unit is Watt, KW,MW
w=energy given
t= time
P=VxI Where v is voltage
I is current
P=V
2
/R
P= I
2
R

12. THANKS