RESISTOR

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. The ohm (symbol: Ω) is the SI unit of electrical resistance, named after Georg Simon Ohm. 


Resistors are used to control (or limit) the amount of current in a circuit or to provide a voltage drop.


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A. Typical symbol of a Resistor  B. Symbol of the unit OHM




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A typical axial-lead resistor

Q. What is its resistance value? 




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Axial-lead resistors on tape



-Board Exam's Favorite item-

A bleeder resistor is a resistor placed in parallel with a high-voltage supply for the purposes of discharging the energy stored in the power source's filter capacitors or other components that store electrical energy when the equipment is turned off.




source: wikipedia

5 comments:

  1. Peter Enmore24 April 2012 at 01:51

    Do you have any information about current sense resistors as well?

    ReplyDelete
  2. JANDEE25 April 2012 at 04:32

    hi PETER.. sorry for the late reply. i've been busy lately. Below are some info about your query.

    Current Sensing Resistors

    What is a Current Sensing Resistor?

    These resistors are used to monitor the current in a circuit and translate the amount of current in that circuit into a voltage that can be easily measured and monitored.


    How do They Work?

    As stated by Ohm’s Law, there is a voltage drop across any resistance when current is flowing. A current sensing resistor is designed for low resistance so as to minimize power consumption. As a result, the calibrated resistance senses the current flowing through it in the form of a voltage drop, which is detected and monitored by the control circuitry. In summary, current sensing resistors translate current into a voltage that is monitored by the controlled circuitry.



    I HOPE THIS INFO ANSWERED YOUR QUERY.

    REGARDS,

    JANDEE

    ReplyDelete
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