Reference Book
principle of ‘mutual induction’, in which an EMF is induced in the transformer’s
secondary coil by the magnetic flux generated by the voltages and currents
flowing in the primary coil winding.Basic Electronic Circuit Components
An electronic circuit is composed of individual electronic components, such
as resistors, capacitors, transistors, inductors, and diodes, Light Emitting
Diodes(LED), Integrated Circuit (IC) chips connected by conductive wires or
traces through which electric current can flow. The combination of components
and wires allows various simple and complex operations to be performed.
Interconnections between the components are done by photolithographic
techniques on a laminated substrate (a Printed Circuit Board or PCB) and solder
the components to these interconnections to create a finished circuit. Screen
printing technique is mainly employed in the production of PCBs.
Resistor: A resistor is an
electrical component that
limits or regulates the
flow of electrical current
in an electronic circuit.
Resistor values are often
indicated with colour
codes. Practically, all
resistors with a power
rating upto 1 watt are
marked with colour
bands. Standard unit of
resistance is Ohm ().
Capacitor:A capacitor is a passive electronic component used to make a time-
delay in a circuit. We can charge and discharge it just like a battery. It consists
of two conducting plates separated by an insulating material called the dielectric.
The standard unit of capacitance is the Farad (F).
Diode:Diode is an electronic device that restricts current flow chiefly to one
direction. A diode consists of two electrodes called the anode and the cathode.
Most diodes are made with semi-conductor materials such as silicon,
germanium, or selenium.
Diodes are sometimes used as rectifiers. A rectifier changes AC to DC. A
light emitting diode or LED is a component that gives light. It is used in an
electronic circuit to give a visual feedback.