BASIC
ELECTRONICS:
Definition of electronics: Electronics is the branch of science that deals with the study of
flow and control of electrons (electricity) and the study of their behavior and
effects in vacuums, gases, and semiconductors, and with devices using such
electrons. This control of electrons is accomplished by devices that resist,
carry, select, steer, switch, store, manipulate, and exploit the electron.
Some of the basic electrical units and definitions are mentioned below:
Passive: Capable of operating without an external power source. Typical passive components are resistors, capacitors, inductors and diodes (although the latter are a special case).
Active: Requiring a source of power to operate.
Includes transistors (all types), integrated circuits (all types), TRIACs,
SCRs, LEDs, etc.
SOME
ELECTRONICS COMPONENTS NAME, SHORT NOTE WITH FIGURE:
Resistor: A resistor is a passive two-terminal electrical
component that implements electrical
resistance as a circuit element. The current through a
resistor is in direct
proportion to the
voltage across
the resistor's terminals. Thus, the ratio of the voltage applied across a
resistor's terminals to the intensity of current through the circuit is called
resistance. This relation is represented by Ohm's law:
The ohm (symbol: Ω) is the SI unit of electrical resistance,
Capacitor: A capacitor (originally known as condenser) is a passive two-terminal electrical
component used to store energy in an electric
field. Unit is Farads, Symbol is C. Capacitance is a measure of
stored charge.
Inductor: Inductance: Unit is Henrys, Symbol is H or L (depending on context).
Inductance occurs in any piece of conducting material, but is wound into a coil
to be useful. An inductor stores a charge magnetically, and presents a
low impedance to DC (theoretically zero), and a higher impedance to AC
dependent on the value of inductance and the frequency. In this respect
it is the electrical opposite of a capacitor. Inductance is always a
positive value. 