Electronic Components Flashcards
refers to the possibility of doing work
potential
The symbol for potential difference
E
practical unit of potential difference
volt (v)
when a charge is forced to move because of a potential difference current is produced.
current
current indicates the intensity of the electricity in motion
amperes
a path for current flow
circuit
current can only exist when there is conductive path
open circuit
powered by battery sources are termed direct current circuits
direct current
an alternating voltage source periodically alternates or reverses in polarity
alternating current
opposition to the flow of current
resistance
the amount of current in a circuit is dependent on its resistance and the applied voltage
Ohm’s Law
Unit of electrical power
watt
how much work is done over time
power
A component with 2 leads, to control the electric current flow through the circuit
Resistor
The value of the resistor varies with light applied over it
Light Dependent Resistor (L.D.R.)
A component with 2 leads (connections), Its function in a circuit is to charge up to a voltage, hence storing electrical charge (energy)
Capacitor
Capacitor value is measured in
Farads (F)
A capacitor whose leads are marked with (+) and (-)
Polarized Capacitor
A component with 2 leads (connections), Its function in a circuit is to control the direction of electric current flow through the circuit
Diode
Diode connections are named
ANODE and CATHODE
to indicate the presence of
voltage, or to produce light
Light Emitting Diode (L.E.D.)
A component with 3 leads (connections), Its function in a circuit is as an electronic switch, or as an amplifier
Transistor
Two types of transistors are available
NPN, PNP
The transistor connections are named:
- COLLECTOR (C)
- BASE (B)
- EMITTER (E) Appearance
Schematic Symbols
A component with a number of pins ranging from 8 to 40 (and more)
Integrated Circuits (IC)
A source of DC Power used to supply electronic components and circuits, can be in the form of a battery
Battery (DC Power Supply)
Used to interconnect components to form a circuit, must be insulated
Wire (Conductor)
used during experiments to insert into the
prototyping (Breadboard) Board
Single stranded
used in practice for improved flexibility
Multi-stranded
Used to build electronic circuits for
experimental purposes
Prototyping Board (Breadboard)
