Fuse Characteristics — UPSC Prelims PYQ 1998
A fuse is used in main electric supply as a safety device. Which one of the following statements about the fuse is correct?
- It is connected in parallel with the main switch
- It is made mainly from silver alloys
- It must have a low melting point
- It must have a very high resistance
Explanation
Option (c) is correct
- A fuse protects electrical circuits from excess current. It is connected in series, not parallel.
- It should melt quickly when excess current flows. Therefore, it must have a low melting point.
Answer: (c) It must have a low melting point
