Physics
The use of MCB is more convenient than a fuse because :
- it avoids the inconvenience of connecting a new fuse wire
- it is much safer for quick response
- it takes a very long time for tripping
- both (1) and (2)
Household Circuits
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Answer
(d) both (1) and (2)
Reason — The use of MCB is more convenient than a fuse because :
- it avoids the inconvenience of connecting a new fuse wire
- it is much safer for quick response
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Related Questions
The full form of MCB is :
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Assertion (A): A fuse wire must have a high resistance and low melting point.
Reason (R): A fuse is only used for a small current flow.
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- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
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Assertion (A): Same current flows through the live wires and the filament of a bulb, but the heat produced in the filament is much higher.
Reason (R): The filament of a bulb is made of low resistance and high melting point.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
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