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Thursday, November 22, 2012

Resistor definition and example

         Resistor is the electronic component use to reduce the flow of current.
         Resistors are available at ¼, ½, 1, 2, 4 Watts and we need to select the appropriate one we need depending upon the voltage drop and current flowing through that.
         In our usual circuits working under 5 to 25 volts we use ¼ W resistors and its size will be small.
         The value of resistor is being calculated using the color codes given in that.

         Variable resistors are the resistors whose value could be changed
         They are of mainly two types: Preset type and Potentiometer Type
         They are being characterized by the maximum resistance it could offer.

It is mainly used for making potential divider arrangements.

Testing With A Multimeter
         Select the resistance range in the multimeter
         Check the resistor with that and get the resistence reading value from that.
         Compare that value with the one given in the color code. If both the vales remains same within the tolerance range, then it is working fine.

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