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inductors are used extensively in analogue circuits and signal processing. inductor in conjunction with capacitors and other components form tuned
an inductor is generally constructed as a coil of conducting material characteristically copper wire wrapped around a core either of air or a
inductance is the circuit parameter to describe an inductor. it is an effect which results from the magnetic field that forms around a current
inductors are the electronic components designed especially for introducing a required amount of inductance in the circuit. they are coils of wires
these capacitors are used as tuning capacitors in radio receivers. the two requirements of these capacitors are1
in this type of capacitors the dielectric consists of an extremely thin film of aluminium oxide formed on one of its aluminium foil plates. intimate
these capacitors are made using vitreous enamel on mixture of silica alkali oxides and fluorides as dielectrics. these capacitors are formed by
very thin glass sheets are used to form these capacitors. the sheets are interleaved with aluminium foil and fused together to forms a solid block.
air dielectric capacitors are used mainly as laboratory standards of capacitance for measurement purposes. the insulating material used in these
melinex film can be interleaved with paper. the material is then silvered. it is the rolled to form capacitor. high voltage capacitors are sealed to
a highly polished metal surface is coated with a colloidal aqueous dispersion of p.t.f.e. it is force dried and sintered until a continuous film is
polystyrene film is extruded flat and free from pin-holes. film is made from polystyrene granules by extruding heated tube of polymer which is then
since polymeric materials can be formed in thin highly uniform and non porous films with high dielectric strength these materials are preferred
mica is a mineral that can be readily sliced into thin chips makes an excellent dielectric and is used in capacitance incorporated in circuits
as the name indicates the dielectric of this type of capacitor is a ceramic. the basis of ceramic material is mainly barium titanate or a similar
one side of impregnated paper capacitors is sprayed with metal. when such paper is rolled its gives higher capacitance for a given value. this
in this type of capacitors the dielectric consists of one or more layer of extremely thin craft paper which looks very much like cigarette paper. the
the capacitors can be classified on the basis of nature of value type of dielectric material used and polarity.on the basis of nature of
1 capacitance the value of capacitance depends upon the area of conducting plates thickness of dielectric material
capacitor have thin conducting plates usually made of metal separated by a layer of dielectric then stacked or rolled to form a compact device. many
this is a new generation of resistor having very low temperature coefficient of resistance. a metal foil made from a special alloy is bonded on to a
decade resistors are wire wound resistors. these are wound on cards moulded on round a switch of low contact resistance. alloys used for wire are
these are resistors with long term stability and close tolerances. these are used in measuring instruments. wire wound resistors produced with long
these resistors change their resistance with variations of incident light energy.manufacturingcadmium sulphide is obtained in a highly pure
a vdr is a special type of resistor that changes its resistance with rise in voltage. it has a very high resistance at low voltage below the trigger