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Q.

Which of the following are the reasons for MCB’s being used instead of fuse?


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a

Fuse can handle more current than MCB

b

MCBs are more convenient than the fuses

c

MCBs are cheaper than the fuses

d

All of these 

answer is B.

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Detailed Solution

MCBs are being used instead of fuses because MCBs are more convenient than fuses.
Every time a fuse breaks, it is required to replace the fuse wire. Replacing the fuse wire is too much work. MCBs are much more convenient than fuses. MCBs automatically break the circuit when the current crosses its safe limit and can be turned on easily. Unlike a fuse, MCB is based on the magnetic effect of the electric current.
 
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