Physics
Grade-7
Easy
Question
Which has no importance for fuse wire?
- Current passing through the wire
- Specific resistance of the wire
- Length of wire
- Diameter of wire
Hint:
Length of wire
The correct answer is: Length of wire
If too high a current flows, the element rises to a higher temperature and either directly melts, or else melts a soldered the fuse, opening the circuit and the current stops flowing through it. Hence, the length of the fuse wire does not matter.
The current rating of the fuse wire is independent of its length.
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