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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
cermets are a hybrid mixture of ceramic and metal. these are made by screening a mixture of glass and metal oxide on to a ceramic substrate. it is
manufacturing two processes are used manufacturing.coated film a mixture of carbon filler and binder is coated on a ring of insulating material. the
the variable resistor is a resistor whose value can be accustomed by turn a shaft or sliding a control. they are also referred to as potentiometers
for higher current rating application resistance wires with extremely large cross sections are required. the necessary large cross sections are
these resistors are usually of carbon composition carbon film on a ceramic rod and sealed in evacuated glass tube. end connections are made up of
manufacturing the resistance element is used as a wire made from special alloys which have small low temperature coefficient and good stability
manufacturing nickel film is deposited on ceramic substrate. this is done by electrolytic deposition of nickel in a chemical bath containing
manufacturingpure carbon is deposited on ceramic substrate by thermal decomposition of hydrocarbon at 10000c. the sheet resistance of film is
manufacturingresistive element is prepared in carbon composition but the filler used is ceramic powder. the sheet resistance is controlled by
manufacturing these resistors do not require substrate. resistive material is a mixture of finally ground graphite filter and resin blander. filter
the fixed value resistors are those whose resistance are fixed and cannot be changed. the fixed resistors can be further subdivided into following
the following steps are taken in the manufacturing of a resistor1 preparation of substrate substrate should hold the
depending on the material of the resistance element resistors are classified into linear resistors and non linear resistors. majority of the
a resistor is a two-terminal electrical or electronic component that resists an electric current by producing a voltage drop between its terminals in