MCB


 
 
Concept Explanation
 

Miniature Circuit Breaker MCB

An MCB is a kind of electronic switch that functions automatically. It can detect a problem occurring inside a circuit by identifying the extreme amount of current flow in the circuits. Sometimes there is a large amount of power available in the loop, it can break the loop any moment. Thus, the fuses are used as a substitute for the MCB's.

Functions of MCB :-

  • MCB is created to safeguard from defects in excessive current and overheating.
  • When the current crosses the defined limit, MCB automatically switches off and the loop breaks.
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    Sample Questions
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    Question : 1

    Which of the following is an advantage of using a MCB?

    Right Option : D
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    Explanation
    Question : 2

    Circuit breaker device which can be used in place of fuse in domestic electric wiring  is called 

    Right Option : C
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    Explanation
    Question : 3

    MCB is the short form for ___________________ .

    Right Option : D
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    Explanation
     
     
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