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
An alloy of lead and tin is used as the material of the fuse wire because its melting point is …………… and specific resistance is …………… ,
- high, high
- low, high
- low, low
- high, low
The rating of a fuse connected in the lighting circuit is:
- 15 A
- 5 A
- 10 A
- zero
A switch in a table lamp is connected in the neutral wire. The lamp works fine. Identify the correct statement :
- Current flow stops when switch is off, it is safe.
- It is safe because neutral wire is at zero potential.
- It is unsafe as switch gets heated.
- It is unsafe as lamp body is connected to the live wire.
Out of the two given cases of wiring of a house, which one is relatively safer ?
(a) House A ⟶ Switch in neutral with earth connected.
(b) House B ⟶ Switch in live with no earth connected.
- Both are equally safe.
- Both are equally unsafe.
- House B is safer.
- House A is safer.