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)
Related Questions
The full form of MCB is :
- miniature current breaker
- miniature current board
- miniature circuit breaker
- miniature circuit board
The rating of a fuse connected in the lighting circuit is:
- 15 A
- 5 A
- 10 A
- zero
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.
- 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.
- assertion is true but reason is false.
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.
- assertion is true but reason is false.